Although the screen still looks great, the color gamut in the iPad mini with Retina colors are not up to par with other tablets in its league, for example the Nexus 7 and Kindle Fire HDX. The color gamut on the iPad mini Retina is essentially the same as the original one-year old iPad mini. Some users are disappointed with this.
AnandTech were very impressed with the iPad mini with Retina but were disappointed in its color gamut: "Although display resolution is no longer a concern on the mini, color gamut hasn't changed between the old and new minis. The iPad mini with Retina Display has the same color gamut as the standard iPad mini, which is narrower than the iPad Air and less than the sRGB coverage we normally look for. The biggest issue here is that there are other smaller tablets in this price range that do offer sRGB coverage" (e.g. Nexus 7, Kindle Fire HDX 8.9)