[im3w1l]

Well let's say you want to create berry and fruit flavored chocolate. You make an orange chocalate wrapped in orange, a mint chocolate wrapped in green, a lemon chocolate wrapped in yellow and a blueberry chocolate in bluish purple.

These are fairly common color/taste pairings used across products and product categories.

[notahacker]

Cadburys tried to trademark the specific colour Pantone 2865c for bars of milk chocolate. They still lost.