RLM Colour Formulas

These recipes have been collected from various sources around the web and Tamiya instructions.  There are duplicates in the list and sometimes they conflict with each other. So... you're mileage may very.  Some of these are probably older mixes and new color releases have superseded the need for that particular color mix. 
LUFTWAFFE
RLM 02--> XF22:1 + XF49:1 or just XF-22
RLM 65--> XF23:1 + XF2:1
RLM 71--> XF62:1 + XF49:1
RLM 74--> XF24:3 + XF27:2
RLM 75--> XF24:5 + XF50:1
RLM 76--> XF2:7 + XF23:1 + XF66:2
RLM 79--> XF59:3 + XF64:1
RLM 80--> XF58
RLM 81--> XF51:1 + XF64:2
RLM 82--> XF5 or XF5:1 + XF2:1 or XF5:1 +XF3:1 (Bright Green)
RLM 83--> XF61 or XF24:1 + XF51:1 or XF24:1 +XF51:1 (Dark Green)
Tamiya instruction sheets: 
LUFTWAFFE 
RLM 02:- XF22:1 + XF49:1 or just XF-22 
RLM 65:- XF23:1 + XF2:1 
RLM 70: XF27 
RLM 71:- XF62:1 + XF49:1 
RLM 74:- XF24:3 + XF27:2 
RLM 75:- XF24:5 + XF50:1 
RLM 76:- XF2:7 + XF23:1 + XF66:2 
RLM 79:- XF59:3 + XF64:1 
RLM 80:- XF58 
RLM 81:- XF51:1 + XF64:2 
RLM 82:- XF5 or XF5:1 + XF2:1 or XF5:1 +XF3:1 (Bright Green) 
RLM 83:- XF61 or XF24:1 + XF51:1 (Dark Green) 
RLM 78:-	XF-23:4 and XF-50:1 
From other modelers: 
RLM 71 XF 61 Dark Green Straight 
RLM 78 is a close match to FS 35414. Use Tamiya XF23 light blue and add white. I think the formula I have is 3 parts XF23 to 1 part XF2. 
RLM 02: XF22:1 + XF49:1 + XF2:2 
RLM 65: XF23:2 + XF2:1 
RLM 66: XF24 Straight from the bottle. 
RLM 70: XF27 Straight from the bottle. Add a drop of black to darken if desired. 
RLM 71: XF62:1 + XF49:1 or XF61:3 + XF2:1 or XF81 straight from the bottle. 
RLM 74: XF24:3 + XF27:2 
RLM 75: XF24:5 + XF50:1 
RLM 76: XF2:7 + XF23:1 + XF66:2 
RLM 78: XF23:4 + XF50:1 
RLM 79: XF59:3 + XF64:1 
RLM 80: XF58:6 + XF2:1 
RLM 81: XF51:1 + XF64:2 OR Dunkelgrun = XF61:4 + XF2:1 (FS34096) 
RLM 82: XF5:1 +XF3:1 (Bright Green) 
RLM 83: XF5 Straight from the bottle. 
RAF:
INTERIOR GREEN---> XF5:1 + XF21:3 + XF65:1
DARK GREEN--> XF58:1 + XF62:5
DARK EARTH--> XF52:1 + XF64:1
OCEAN GRAY--> XF18:1 + XF21:2 + XF24:2
MIDSTONE------> XF59:1 + XF60:1
SKY----------------> XF21
MED. SEA GRAY--> XF19:3 + XF54:5
AZURE BLUE---> X16:2 + XF2:10 + XF18:5
FAA COLORS
Extra Dark Sea Grey: To 50 parts of XF24 (dark grey), add 6 parts XF2 (white), and 3 parts XF8 (flat blue).
Dark Slate Grey: To one bottle of XF22 (RLM Grey), add 35 drops of XF7 (red), and 125 drops of XF1 (flat black).
or
T:XF-11 + 63?
"RLM Grey" (XF-22) is a good match for "Slate Grey", used for RAF Coastal Command finishes, as well as Fleet Air Arm colors.
"Dark Sea Grey" (XF-54) is a good match for "Dark Sea Grey," used for Coastal Command and FAA camouflages. This is also good for the US "Equivalent Color" for "Ocean Grey" ANA 603, used on Mustang IIIs, etc.
'"RLM Gray" (XF-22) for "Slate Grey"
“Light Sea Grey” (XF-25) for "Light Sea Grey" 
"Sky" (XF-21) - I think this is the most accurate version of this color.
"Sky Grey" (XF-19) is perfect for the "Sky Grey" color used on FAA aircraft before they went with the "Sky" lower surfaces, also for the US "Equivalent Color" used for ANA 602
"Medium Grey" (XF-20) is good as "Sea Grey Medium," the lower surface camouflage for RAF aircraft after 1941. 
Here are Tamiya mixes to reproduce some Federal Standards (FS) Colors.
Last updated: 2012-08-11
The hyperlink included with the colors sends you to the Federal Standard 595 Color Server website to give you an idea of how the colors look.
The mix ratios are by parts, i.e. XF2:1 means XF2 Flat White 1 part (1 drop or 1 gallon, the mix stays the same)
Warning: Several mixes I've tested myself (those with an *) but most of them come from Tamiya instructions, articles found in magazines and the web. I find them good but these are in no way definitive. They serve as a general guide that you can modify to taste.
Scale effect: for those who believe, the smaller the scale, the lighter the colors. Thes mixes are formulated for 1/32 but you can add XF2:1 for 1/48 or XF2:2 for 1/72 as a start. Lighten to taste.
Browns X0XXX
*30051 US NATO Brown CARC 383 -- XF10:6+ XF69:1 
http://www.colorserver.net/showcolor.asp?fs=30051
20061 -- Tea Brown (WW2 Japan Propeller) -- X9 Brown:6 + XF7 Red:3 + XF1:1
http://www.colorserver.net/showcolor.asp?fs=20061
30070 -- RAL 8017 WW2 German Red Grown -- XF-64:8 + XF-49:2
http://www.colorserver.net/showcolor.asp?fs=30070
30075 -- XF79
http://www.colorserver.net/showcolor.asp?fs=30075
30108 -- Red Brown -- XF-10
http://www.colorserver.net/showcolor.asp?fs=30108
30111 -- XF68:3 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=30111
30117[/color] – MERDC Brown -- XF64:1 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=30117
[b]30118 – RAF DARK EARTH 
*Mix 1--XF-52:1 + XF64:1 + XF-2:1 
*Mix 2--XF-52 (Tamiya Spitfire VIII 1/32 instruction)
*Mix 3--XF-52:4 + XF-3:2+ XF-51:1 + XF-2:1 
http://www.colorserver.net/showcolor.asp?fs=30118 
30140 -- XF52:1 + XF64:1 (Tamiya F-16 Agg 1/48 Instructions)
http://www.colorserver.net/showcolor.asp?fs=30140
*30145 -- XF52
http://www.colorserver.net/showcolor.asp?fs=30145
*30219 -- RLM 79 -- XF59:6 + XF64:2 + XF2:1 
http://www.colorserver.net/showcolor.asp?fs=30219
30257 –- Australian Army 
*Mix 1 -- XF52:2 + XF15:2 + XF2:1
*Mix 2 -- (MERDC Pale Brown) -- XF-52:1 + XF57:8 
http://www.colorserver.net/showcolor.asp?fs=30257
30266 – RAF MIDSTONE -- XF59:1 + XF60:1+ XF-2:1
http://www.colorserver.net/showcolor.asp?fs=30266
30277 -- MERDC Sand -- XF57:4 + XF63:1
http://www.colorserver.net/showcolor.asp?fs=30277
30279 -- XF79:9 +XF7:1
http://www.colorserver.net/showcolor.asp?fs=30279
30318 -- XF57
http://www.colorserver.net/showcolor.asp?fs=30318
30400 -- XF15:1 + XF2:1 + XF59:1 (Tamiya F-16 Agg 1/48 Instructions)
http://www.colorserver.net/showcolor.asp?fs=30400
Reds X1XXX
*FS 31668 -- PRU Pink -- XF9:1 + XF7:1 + XF2:9
http://www.colorserver.net/showcolor.asp?fs=31668
Oranges X2XXX
22300 -- Orange-yellow japan (trainer/experimental) -- X8:18 + X7:1 
http://www.colorserver.net/showcolor.asp?fs=22300
32519 -- XF15:3 + XF55:1 
http://www.colorserver.net/showcolor.asp?fs=32519
Yellows X3XXX
33245 -- RAL 8000 WW2 German Africa Yellow -- XF-49:8 + X-6:1 + XF-2:2
http://www.colorserver.net/showcolor.asp?fs=33245
33303 -- XF60:3 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=33303
33481 -- RAL 7028 WW2 German Dark Yellow -- XF60:7 + XF2:3
http://www.colorserver.net/showcolor.asp?fs=33481
33522 -- RAL 7028 End of war -- XF-20:1 + XF-2:4 + 1 tiny drop of red
http://www.colorserver.net/showcolor.asp?fs=33522
Greens X4XXX
34036 -- Nakajima Dark Green (Navy) -- XF11:5 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34036
34050 -- RLM 70 -- XF27:4 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34050
34052 -- RLM 80 -- XF58:6 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34052
34056 -- WW2 Soviet -- XF-61:7 + XF-60:3
http://www.colorserver.net/showcolor.asp?fs=34056
34058 -- (Tamiya F-16 Agg 1/48 Instruction) -- XF-70
http://www.colorserver.net/showcolor.asp?fs=34058
34077 -- J.A. Green -- XF-13
http://www.colorserver.net/showcolor.asp?fs=34077
34079 -- RAF DARK GREEN 
*Mix 1 -- XF58:1 + XF62:5 + XF-2:1
*Mix 2 -- New Tamiya Color: Dark Green 2 (RAF)-- XF-81
*Mix 3 -- RLM 71 -- XF62:1 + XF49:1 + XF2:1
*Mix 4 -- XF61:1 + XF65:1 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34079
34083 -- RAL 6003 WW2 German Dark Green -- XF-61:7 + XF-60:3
http://www.colorserver.net/showcolor.asp?fs=34083
34084 -- RLM 74 -- XF24:2 + XF-51:1 + XF27:1 + XF2:4 
http://www.colorserver.net/showcolor.asp?fs=34084
34086 -- RLM 74 (variation) -- XF24:2 + XF27:1 + XF2:3 
http://www.colorserver.net/showcolor.asp?fs=34086
34088 
Mix 1 -- RLM 81 -- XF61:5 + XF-7:1 + XF2:2
Mix 2 -- WW2 UK+Canada Armor -- XF-62:6 + XF-49:4
http://www.colorserver.net/showcolor.asp?fs=34088
34092
Mix 1 -- Medium Green USAAF -- XF13:1 + XF2:1
Mix 2 -- XF26:3 +XF2:1
http://www.colorserver.net/showcolor.asp?fs=34092
*34094 -- CARC 383 Nato Green -- XF-67
http://www.colorserver.net/showcolor.asp?fs=34094
34096 -- Dark Green
Mix 1 -- Mitsubishi Dark Green -- X5:5 + XF3:3 + X3:2
*Mix 2 -- WW2 US Armor --XF62:4 + XF49:1
*Mix 3 -- RLM 81 -- XF61:4 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34096
*34097 -- RLM 83 -- XF62:4 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34097
*34098 -- Cougar/Grizzly/Husky -- XF67:3 + XF59:2
http://www.colorserver.net/showcolor.asp?fs=34098
*34102 -- Forest Green -- XF5:3 + XF13:3 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34102
*34110 -- France Nato Green -- XF5
http://www.colorserver.net/showcolor.asp?fs=34110
34128 -- Australian Army -- XF-62:3 + XF-52:3 + XF-2:1
http://www.colorserver.net/showcolor.asp?fs=34128
34138 -- RLM 82 -- XF5:1 + XF3:1 + XF2:1 
http://www.colorserver.net/showcolor.asp?fs=34138
34151 -- Loam Green MERDC -- XF5:1 + XF57:3
http://www.colorserver.net/showcolor.asp?fs=34151
*34159 -- XF73:3 + XF2:1
http://www.colorserver.net/showcolor.asp?fs=34159
*34172 -- Cougar Grizzly Husky -- XF70:1 + XF59:3
http://www.colorserver.net/showcolor.asp?fs=34172
*34201 -- XF-49:3 + XF2:1 
http://www.colorserver.net/showcolor.asp?fs=34201
34227 -- RAF INTERIOR GREEN (vert intérieur) 
*Mix 1 -- XF-71:1 + XF-21:1 + XF-2:1
Mix 2 -- XF5:1 + XF-21:3 + XF-65:1 + XF-2:1
http://www.colorserver.net/showcolor.asp?fs=34227
34255 -- Nakajima Interior grey-Green -- XF2:9 + X1:3 + X5:3 + X8:2 
http://www.colorserver.net/showcolor.asp?fs=34255
34424 -- RLM 84 -- XF14
http://www.colorserver.net/showcolor.asp?fs=34424 
34432 -- RLM 84 Variation -- XF12
http://www.colorserver.net/showcolor.asp?fs=34432 
*34504 -- RAF SKY -- XF-21:1 + XF-2:1
http://www.colorserver.net/showcolor.asp?fs=34504
Blues X5XXX
15042 – USN Glossy Sea Blue ANA 623 -- XF-17:1 + XF-8:1
http://www.colorserver.net/showcolor.asp?fs=15042
35045 – USN NON-SPEC. SEA BLUE ANA 607 -- XF-17:5 + XF-8:3 + XF-2:2
http://www.colorserver.net/showcolor.asp?fs=35045
35052 -- XF8:9 + XF7:1
http://www.colorserver.net/showcolor.asp?fs=35052
35109 -- XF8:3 + XF2:4 (Tamiya F-16 Agg 1/48 Instruction)
http://www.colorserver.net/showcolor.asp?fs=35109
35164 – USN INTERMEDIATE BLUE ANA 608 -- XF18:5 + XF-2:3
http://www.colorserver.net/showcolor.asp?fs=35164
35189 – USN BLUE-GREY -- XF18:1 + XF-2:1
http://www.colorserver.net/showcolor.asp?fs=35189
35190 – PRU BLUE -- XF18:1 + X14:2 +XF-2:2
http://www.colorserver.net/showcolor.asp?fs=35190
35231 – RAF AZURE BLUE 
*Mix 1-- X16:2 + XF-2:4 
*Mix 2-- XF-8:1 + XF-2:3 (Tamiya Spit VIII 1/32 instructions)
http://www.colorserver.net/showcolor.asp?fs=35231
35237 
*Mix 1 -- XF-66:1 + XF-19:1 + XF-2:2 + 
*Mix 2 -- CF-18 -- XF66:1 + XF54:1 + XF2:2 
http://www.colorserver.net/showcolor.asp?fs=35237
35250 -- XF8:5 + XF19:1 + XF2:5 
http://www.colorserver.net/showcolor.asp?fs=35250
35352 -- RLM 65 -- XF23:4+ XF2:1
http://www.colorserver.net/showcolor.asp?fs=35352
35414 -- RLM 78 -- XF23:5 + XF54:1 + XF2:2
http://www.colorserver.net/showcolor.asp?fs=35414 
35450 -- X14:1 + XF2:6 (Tamiya F-16 Agg 1/48 Instructions)
http://www.colorserver.net/showcolor.asp?fs=35450
35488 -- SU-27 -- XF8:5 + XF19:1 + XF2:10 
http://www.colorserver.net/showcolor.asp?fs=35488
35526 -- XF8:1 + XF2:10 (Tamiya F-16 Agg 1/48 Instruction)
http://www.colorserver.net/showcolor.asp?fs=35526
35622 -- RLM 76 and 84(blue variation) 
*Mix 1 -- XF18:1 + XF24:5 + XF2:10
*Mix 2 -- XF23:1 + XF2:3 (Tamiya F-16 Agg 1/48 Instruction)
http://www.colorserver.net/showcolor.asp?fs=35622
Greys X6XXX
36008 -- XF-63:9 + XF19:1
http://www.colorserver.net/showcolor.asp?fs=36008
36081 -- RAL 7021 Gris Panzer Allemand 1 (Dark) -- XF-63:7 + XF-60:3
http://www.colorserver.net/showcolor.asp?fs=36081
36118
*Mix 1-- RLM 74 -- XF-24:10 + X-14:1 + XF-2:1
*Mix 2-- RAL 7021 German Panzer Grey 2 (Pale) --XF-63:7 + XF-2:3
http://www.colorserver.net/showcolor.asp?fs=36118
36122 -- RLM 75 -- XF66:6+XF7:2+XF18:1+ XF2:2
http://www.colorserver.net/showcolor.asp?fs=36122
36152 – RAF OCEAN GRAY 
*Mix 1-- XF18:1 + XF-21:2 + XF24:2 + XF-2:1
*Mix 2-- New Tamiya Color: Ocean Gray 2 (RAF)-- XF-82
http://www.colorserver.net/showcolor.asp?fs=36152
36165 -- RLM 02- FS 36165 -- XF22:1 + XF49:1 + XF2:2
http://www.colorserver.net/showcolor.asp?fs=36165
*36173 -- (Perfect for C-17 1/144) -- XF-54:3 + XF-24:1 + XF-2:4 
http://www.colorserver.net/showcolor.asp?fs=36173
36176 -- XF-66:3 + XF-2:1
http://www.colorserver.net/showcolor.asp?fs=36176
36231 -- XF-83:1 + XF-66:1 + XF-54:1 + XF-2:3
http://www.colorserver.net/showcolor.asp?fs=36231
36251 -- XF-83:3 + XF-2:1
http://www.colorserver.net/showcolor.asp?fs=36251
36270
*Mix 1-- XF54:6 + XF66:1 + XF2:6
*Mix 2-- RAF MEDIUM SEA GRAY -- XF-19:3 + XF-54:5 + XF-2:1
*Mix 3-- New Tamiya Color: Medium Sea Gray 2 (RAF) -- XF-83
http://www.colorserver.net/showcolor.asp?fs=36270
36314 -- XF-19
http://www.colorserver.net/showcolor.asp?fs=36314
36320
*Mix 1-- XF-66:1 + XF-54:1 + XF-2:3
*Mix 2-- XF19 (Tamiya F-16 Agg 1/48 Instructions)
http://www.colorserver.net/showcolor.asp?fs=36320
36375 Light Ghost Grey
*Mix 1-- XF-19:1 + XF-2:3 
*Mix 2-- CF-18 -- XF19:1 + XF54:1 + XF2:4 
*Mix 3-- Mitsubishi Light Gray FS26375 -- XF2:18 + XF1:1
http://www.colorserver.net/showcolor.asp?fs=36375
36440 Light Gull Grey
*Mix 1 -- XF-19:1 + XF-80:1 + XF-2:2
*Mix 2 -- USN LIGHT GREY -- XF-19:2 + XF-2:1 (add a tiny drop of yellow)
http://www.colorserver.net/showcolor.asp?fs=36440
36473 Light Aircraft Grey - RLM 76 -- XF23:1 + XF66:2 + XF2:7
http://www.colorserver.net/showcolor.asp?fs=36473
36495 -- XF19:1 + XF2:4
http://www.colorserver.net/showcolor.asp?fs=36495
36622 -- XF80:2 + XF2:7
http://www.colorserver.net/showcolor.asp?fs=36628
36628 -- XF80:1 + XF2:4
http://www.colorserver.net/showcolor.asp?fs=36628
ome Tamiya Mixes from Tamiya kit instructions:
RAF
INTERIOR GREEN:- XF5:1 + XF21:3 + XF65:1 
DARK GREEN:- XF58:1 + XF62:5 
DARK EARTH:- XF52:1 + XF64:1 
OCEAN GRAY:- XF18:1 + XF21:2 + XF24:2 
MIDSTONE:- XF59:1 + XF60:1 
SKY:- XF21 
MED. SEA GRAY:- XF19:3 + XF54:5 
AZURE BLUE:- X16:2 + XF2:10 + XF18:5 
AS6 Olive Drab  =  XF-62
AS7 Neutral Gray  =  XF-53
AS8 Navy Blue  =  XF-17:5 + XF-8:3 + XF-2:2
AS9 Dark Green  =  XF-58:1 + XF-62:5
AS10 Ocean Gray  =  XF-18:1 + XF-21:2 + XF-24:2
AS11 Medium Sea Gray  =  XF-19:3 + XF-54:5
AS12 Bare-Metal Silver
AS13 Green
AS14 Olive Green
AS15 Tan
AS16 Light Gray
AS17 Dark Green (IJA)
AS18 Light Gray (IJA)
AS19 Intermediate Blue (U.S.Navy) =  XF-18:5 + XF-2:4
AS20 Insignia White (U.S.Navy)  =  XF-2:10 + XF-55:1
AS21 Dark Green 2 (IJN)
AS22 Dark Earth  =  XF-52:1 + XF-64:1
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