The top row on this palette is normal terracotta, and the bottom row is concrete. Notice that warm colours such as red and yellow are identical while cold colours such as blue and purple are barely recognisable.
The middle row is terracotta with a colour correction pack. In games such as EggWars it can be quite important to be able to recognise block colours, and depending on the colour of the person you may mistake them for a different colour due to their blocks. Just a small quality of life suggestion.