Made a reference image for Undertale colors both canon and fanon! Some I made up, some others made up. If you use this PLEASE credit me.

The colors:

Pink/mettle

Fuchsia/audacity

Magenta/heroic

Red/determination

Maroon/confidence

Orange/bravery

Yellow/justice

Lime/curiosity

Light green/friendliness

Olive/wisdom

Mint/optimism

Green/kindness

Turquoise/creativity

Light blue/patience

Blue/integrity

Navy/loyalty

Indigo/perseverance

Lavender/fairness

Violet/pacifist

Beige/stability

Sepia/recollection

Hazel/forethought

Brown/humility

Gray/altruism

Silver/faith

Gold/honesty

Black/hate

White/love