Technically Quint's colors have been fixed for quite some time, you'll have to wait till MM8 classes for it though.
Seems the TheunlosingQuint already sent a pm to Mush, here are my comments.
TL;DR at bottom.after V7a, theres at least 3 or 5 classes that need a recolor, the other list is.... well you dont need to read the second list. here it is. Take in mind this: I dont have any idea about original NES colors, but I'm sure about the first list.
"""Official Art is now renamed to OFF for shortening"""
--Those below are a must fix, the others are more like sugestions.
-Quint: quintbuster has wrong colors, just swicht betwen sakugarne and quintbuster and you will see the problem, quintbuster uses the old palete colors.
--Fixed already bro
-Hardman: This one is cleary noticeable, hud color does not fit with that dark cool blue used on the skin, change the hud and put the dark blue.
--The brighter blue looks rather nice, OFF isn't as green blue as sprite
-Brightman: or you change the skin color to be orange, or you change the hud color to be pink (I think the last one would be better.
--Key point, we won't really change the color of the skin unless its really needed, also orange in OFF
-Enker: HUD does not use the same exact colors based on the skin.
--Hand is blue like everything(sprite, hud, OFF), sure its not blue/purple like the sprite but its blue
-Ballade: HUD does not use the same exact colors based on the skin.
--I guess a different purple rather than pink would be better
--just take a look for those classes below, maybe you can improve something.
-Cutman: red part of the hand should be more "pink"
--Red hand, pink sprite, OFF is orange, which one to go with hmm...
-Gutsman: Hud color is red and yellow, should be "pink-orange"
--Redish orange and yellow in OFF
-Bombman: exactly the same thing as gutsman, should be "orange-pink"
--See Gutsman
-Fireman: same as above, the red part of the hud should be more "pink"
--Red in OFF, looks better red because of FIREEEEE
-Elecman: the same as bombman and gutsman, wrong hud colors, should be "orange-pink"
--Seems to be a running thing with red, Elec is red in OFF and yellow
-Oilman: not pretty sure about this, maybe is good as it is but hud color uses a blue, that blue is not the same as the skin color thing, should use that "brown" instead of blue.
--PU hes blue in anything but Japan, brown in Japan, blue looks fine (Also blue in almost every Megaman comic)
-Timeman: the hud color is too much pink, compared to the skin color.
--Surprised no complaints on the gold rings, could use a more purple hand I guess
-Metalman: I'm not sure about the yellow, but the red hand should be "pink"
--This red stuff is going to happen often, red orange in OFF
-Airman: not sure but the yellow hud color seems a bit palid...
--Guessing pallid was the word, that yellow seems fine, matches the OFF exactly and matches the sprite
-Quickman: metalman, gutsman, elecman,etc.... Quicman has the same problem, maybe the skins use the same colors on diferent classes to much, they look repetitive or something like that, but I,m not a genious about paletes, so do what do you think is better......
--Red yellow in sprite and in OFF, however Megaman's Quickboomerangs are pink, so thats prob why its light red/pink
-Heatman: same again, seems red, shoul look "pink" or maybe you should base the skin and hud colors from real images of the robot masters....
--Dude is real red
-Woodman: mmmm hud colors are a bit darker than skin.
--Bright sprites, dark OFF colors
-Nedleman: 2 options, a darker skin color to fit the hud or the actual cyan blue of the skin aplyed on the hud.
--OFF is a dark blue, looks rather nice in the hud rather than a brighter blue/cyan
-Magnetman: skin color is pink, hud color is red, do what you think is necesary.
--Pink magnets are wierd, red magnets are cool
-Snakeman: HUD is darker than skin color
--Snake is dark green in OFF
-Shadowman: Maybe the skin should have a darker blue to fit with the HUD colors.
--Same colors as OFF, looks nicer darker
-Docrobot: not sure, hud is red and skin is more orange oriented....
--(Who even uses the buster), OFF has him as a bright red
-Toadman: hud colors are diferent compared to the skin colors.
--Same treatmant as Snakeman
-Pharaohman: hud colors use yellow, skin orange ¿does that fit, or is that wrong?
--That hud is the same as OFF
-Diveman: hand colors should use a bit the skin colors.
--Diveman is a nice dark blue in his OFF
-Gravityman: skin is pink, hud is red ¿maybe is wrong?
--Red and pink curse
-Gyroman: uses a darker hud compared to the skin.
--Snakeman and Toadman, although Gyro is a little lighter in color in the OFF
-Chargeman: red hud, pink skin...
--This red and pink is getting out of hand (haha hand), Lightish red(maybe orange) and yellow in OFF
-Crystalman: something is wrong (or the skin has bad colors or the hud is wrong)
--One of the tricky ones, green in sprite, blue in OFF
-Windman: Skin colors are correct, and hud color too but hud color does not have ingame colors,arg... I dont know how to explain it....
--Instead of red, its orange now, OFF uses orange
-Plantman: should use skin colors on the hud.
--Purple OFF, the pink should maybe be a darker purple
-Yamatoman: same as others, uses a similar color for the hud, but not the same color.
--Purple in OFF, sprite might be off but I'm not sure
-Ceantaurman: exctly the same as Toadman.
--Exactly the same as Snake/Toad/Gyro
-Freezeman: Hud color does not fit skin color.
--Purple hands in OFF
-Cloudman: same as others, dieferent colors.
--A little too red on the hud but its the same as OFF
-Springman: HUD does not use the same colors as the skin.
--Very accurate hud, nes and its color limits
-Slashman: same as others.
--Some more accurate huds and limiting nes
-Turboman: same as above, gren hands, blue skin.
--Ehh more limiting nes
TL;DRFinal note from Korby (aka Onigiri) and MusashiAA on HUDs.
[5:51:35 PM] Onigiri: some skins shouldn't use the same colors as their sprites
[5:51:38 PM] Onigiri: because those colors are ugly
[5:52:25 PM] AA: We should color them as close as possible to the artwork
Thanks, I was trying to help, but I can't give a good feedback since I'm not an original megaman fan who knows every aspect of the game (This is not sarcasm). I'm more like a pain in the glass than a helpful guy, sorry. You make me happy posting that, Celebi. Now, my mind can rest in peace for a while....
Also, now I understand what Korby says, I'm agree some of them would look ugly.... Because I wasnt aware about OFF being normally used for hud, and NES colors for skin.