In Chrono Cross, each character and enemy has its own innate color, which can be used in enhancing the power of using same-color Elements while also making them weak against elements of the opposite color. The colors are: White, Black, Blue, Red, Green and Yellow.
Overall, a character's innate color only has a very weak effect on how much damage a skill, spell, or tech will increase by. Here is some math to back it up.
"I ran some tests myself, and my results back this up to a degree. I thought it'd be wise to pick characters with equal stats, just to be sure that innate didn't matter. Turns out, it does. I picked Orcha and Radius, who at 31 stars both have 19 Magic. I gave each an Earthquake and an Inferno, to test (A) if Radius' green innate hurt his Earthquake damage and (B) if Orcha's red innate boosted Inferno. The answer in both cases was yes.
We tested against Shadow Cats on an all-black field to eliminate any field effect wonkiness. After ten tests each, Orcha's Earthquake damage averaged ~120, with a high of 131. Radius' Earthquake averaged 104 with a high of 114. Orcha's Inferno averaged 133 with a high of 140, Radius' Inferno struck for an average 121 with a high of 123 (not much variance there).
Innates don't count for a whole lot, but they definitely factor in." Thanks to Pernai for this test.