I tend to like cooler colors, and though violet is my favorite, I also like hot pink, neon blue, and Sonic blue. I also like different colors for different things. For example, I don't look that good in violet hair, but blue hair fits me very well.
I love the evolving colors of the evening sky: the oranges, pinks, purples, and sometimes-ocean blues of sunset fading into the night's murky mauve and dark gray clouds with faded yellow skyline, all eventually turning to darkness with the distant clouds above towns and cities reflecting their light. I can't ever choose one favorite; they all work so well together.
Just saying one or two favorite colors doesn't make sense to me; I like all colors in the right context. That said, I've been using variants of cerise a lot lately. Shades of black also never fails.
I don't have a favorite color, I love them all in different situations. But my go to response used to be "black or pink" and nowadays I tend to say "orange". But I could just as easily say "matte gray" or "teal" or "warm yellow" or.....