Anyone noticed in Mango some slight tweaks to the Accent colors? Specifically the Lime and Magenta colors seem to have become less deep/contrasty? Well, according to @MS_Nerd, indeed those two colors have undergone a slight modification as you can see above.
MS_Nerd also notes that "Fujitsu uses original lime as custom color.", referring to the IS12T. Going further, HTC now has an "HTC" Accent color on the Radar and Titan that is also more closely matches the old lime, which we like.
While on newer screens, the A2C139-Green isn't too bad, it looks completely washed out on some of HTCs older offerings e.g. the Arrive and HD7. In that sense, we understand why HTC is opting for their own green now, giving users no less than three shades.