Processing math: 100%

$g = \frac{255}{h} (h - y + h_c) + b \frac{\frac{255}{h} (y - h_c)}{255}$

$r = \lfloor \frac{255}{h} (y - h_c) + b \frac{\frac{255}{h} (h - y + c_h)}{255}$