I use xScope [1] to simulate seven types of colorblindness. The blue titles are distinctive in every simulation. Does xScope miss something? Or are you assuming

I use xScope [1] to simulate seven types of colorblindness. The blue titles are distinctive in every simulation. Does xScope miss something? Or are you assuming that blue is not distinctive because most colors are not distinctive? [1] https://iconfactory.com/software/xscope https://iconfactory.com/software/xscope