Should TheoryInterferenceOverlay use red or colorblind red shade?

[samreid]

We currently show the minima in red and maxima in yellow. During code review #259 @pixelzoom asked if we should use our shade of colorblind red instead of pure red. @arouinfar what do you think?

[pixelzoom]

I brought this up in code review because 'red' on 'black' has historically been a bad combination for some types of colorblindness.

[arouinfar]

Thanks for the suggestion @pixelzoom! Let's use RED_COLORBLIND instead of pure red @samreid.

[samreid]

Fixed in the preceding commit, @arouinfar do you want to check on phettest? If all is well, please close.

[arouinfar]

👍