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471431 (4) [Avatar] Offline
10% or so of your male readers are read/green colour-blind. I am one of them, and for me there is no difference between the colours chosen for this picture. Other pictures have blue and red which are very distinguishable.
Nishant Shukla (52) [Avatar] Offline
Thanks for pointing that out! I will make sure red and green are never used as indicators by themselves. For example, in Figure 4.4, both color and symbols are used to indicate positive and negative: green "?" vs. red "?".