Note that in each case the formula contains the fraction M − L H − L {\displaystyle {\frac {M-L}{H-L}}} , where H is the highest of R, G, and B; L is the lowest, and M is the mid one between the other two.
注意在每種情況下公式都包含分式 M − L H − L {\displaystyle {\frac {M-L}{H-L}}} ，這里的H是R, G和B的最高者；L是最低者，而M在另二者之間者。