Question on who's taking the damage with same color strength

i have all hood, cap and thor with purple strength 11. however, no matter which position (left, center, right) i put the hood, he still takes damage for the purple color. i read that the position does make the difference in terms of taking damage, can someone help? thanks

there are fractions of a point of damage that you don’t see. Are the three of them different levels (with Hood highest)?

hood is the lowest. I deliberately keep him Level 135 so that he won’t take any damage for purple. but it didn’t work