Rainbow Hair (3.5e Trait)
From D&D Wiki
 Rainbow Hair
A weaker variant of Rainbow Fur, which a lot more races can take
Prerequisite: The character's race must naturally have hair.
Benefit: Once per day, the character with this trait may cast the spell Rainbow Pattern, with the centre of the spell being the character. The saving throw for this ability is 10 + half of the character's highest class level, rounded down.
Drawback: -2 to any Hide check involving light. When attempting a Diplomacy check, roll a d% and predict high(51-100) or low(1-50). If you are correct, you earn +2 to the roll; if you are incorrect, you instead earn -2.
Roleplaying Ideas: The rarity of this hair colour might intrigue others, or prejudice might lead them to driving the character away.