In limited overs cricket (ODI which are 50 overs and T20 which are 20) they use white balls. This was introduced back in the 80s because they started playing matches into the nights (that was a new thing). White balls are more visible than the traditional red balls. https://en.wikipedia.org/wiki/Cricket_ball#Colour (regardless of the time though all limited overs cricket are played with white ball now)

In Test cricket they still use red balls. But rarely nowadays there are day/night Test matches too. For those matches they use pink balls. It's basically trying to gap between the two, giving visibility + deteriorating slower than a white ball.