Heat Wave can throw some color, but not too bad, depends on the cows background. I think that Wave one tends to throw color easier than HeatWave. Sunseeker will throw way more color than both of the Waves.
Heat wave will throw every color imaginable. In fact the 1st Heat Waves I ever saw were holstein colored. I have had black ones, blue ones, red ones, shorthorn colored, holstein colored and all combos inbetween.