Difference between Colorless and Drab

COLORLESS vs DRAB: NOUN

A promiscuous woman, a slut; a prostitute.
A dirty or untidy woman; a slattern.
A fabric, usually of thick wool or cotton, having a drab blee.
A dull brownish yellow or dull gray color.
A kind of thick woolen cloth of a dun, or dull brownish yellow, or dull gray, color; -- called also drabcloth.
A wooden box, used in salt works for holding the salt when taken out of the boiling pans.
A lewd wench; a strumpet.
A strumpet; a prostitute.
A slut; a slattern.
An English collectors' name for a number of noctuid moths of a drab color: as, the clouded drab, Tæniocampa instabilis; the northern drab, T. opima; the lead-colored drab, T. populeti.
A yellowish-gray tint.
A thick woolen cloth of a yellowish-gray color.
A kind of wooden box used in salt-works for holding the salt when taken out of the boiling-pans. Its bottom is shelving or inclining, that the water may drain off.
A dull grayish to yellowish or light olive brown.
Cloth of this color or of an unbleached natural color.
A negligible amount.
A slovenly woman; a slattern.
A woman prostitute.
A low, sluttish woman.

Weak in color; not colorful
Lacking color.
Alternative spelling of colourless.
Having lost its normal color.
Free from any manifestation of partial or peculiar sentiment or feeling; not disclosing likes, dislikes, prejudice, etc..
Without color; not distinguished by any hue; transparent; ; a colorless gas.
Pale; pallid.
Lacking animation, variety, or distinction; dull. : dull.
Lacking in variety and interest

Not colorful
Weak in color
Pale or hyaline. Jackson, Glossary.
In botany: Having no other color than green.
Destitute of color; not distinguished by any hue; transparent, blanched, or entirely white: as, colorless water, glass, or gas; colorless cheeks or hair.

Gray, Uncolored, Chalky, Whitish, Ashen, Uncoloured, Washy, Pallid, Achromatic, Waxy, Greyish, Drab, Blackish, Colourless, Grayish

Humdrum, Uncheerful, Sorry, Colourless, Sober, Somber, Dismal, Sombre, Colorless, Gloomy, Drear, Dingy, Cheerless, Dull, Dreary

Gray, Uncolored, Chalky, Whitish, Ashen, Uncoloured, Washy, Pallid, Achromatic, Waxy, Greyish, Drab, Blackish, Colourless, Grayish

Humdrum, Uncheerful, Sorry, Colourless, Sober, Somber, Dismal, Sombre, Colorless, Gloomy, Drear, Dingy, Cheerless, Dull, Dreary

The solution may be colorless to pale yellow.
WATER, STIRRED YELLOW, SCARLET AND COLORLESS: See Pyrotechnics.
It is a clear, colorless, odorless, syrupy liquid.
The green mixture is still green and the colorless solution is still colorless.
Colorless diamonds the colorless diamonds may be graded on a laboratory certificate to verify that is similar to the one particular friend.
The carat - in great detail - a 1 carat, colorless d colorless and ends with z the worst, though some diamonds.
Your engagement and the word love in many people who look for colorless to near colorless classification.
Our one in a trillion ring pictured is set with colorless d to near colorless.
Crafted from premium Forever One moissanite, they are guaranteed to be colorless or near colorless.
Both Natural and Lab Grown Diamonds can be colorless or near colorless.

Infantry, especially skirmishers, often wore drab civilian clothes.
Olive Drab Cadmium plating options ensure connector longevity.
Juliet makes to the Friar, is indeed drab.
Interior a bit drab for our tastes, though.
Form Templates and go from drab to WOW!
Plan is friendly but also a bit drab.
Army vehicles had a base coat of lusterless olive drab paint, the olive drab military vehicle paint that had its own variations and evolution.
For a genre that is often filled with drab characters in a drab world, it is refreshing to see something so well fleshed out.
They used their talents to camouflage themselves in drab colors, which then began to run together and blend into a uniform, drab gray.
Yellow Olive Drab US Navy Vintage Olive Drab White.