I made a post over at the 3dr board while back detailing my findings:
Quote
I played around with red, but I made the discovery that the reason red looks dramatically "evil" in classic is because the reds are actually "brighter" in the original palette than can be achived with tints.
Take this gray color for example: (148, 136, 140) and compare it to it's red equivalent (216, 52, 20) here's the percent difference: 145%, 38%, 14%. In order to tint it properly, the red cannot exceed 100% or you will have a problem with saturation and contrast.
I got kinda close by adjusting saturation and contrast, but that isn't currently possible with tints.
Take a look at this image which uses the original pals:
here's the current tint:
and here's what PAL2 looks like with the new tint:
The current tint appears to be an attempt to replicate the light shaded colors like light greys, light blue and tans, and the new tint appears to replicate the dark shaded colors like brown dark blue and darker greys. This goes back to the problem where the contrast of PAL2 is on a different scale than tints can currently achieve, if that makes sense.