Weird tint whilst texturing

Does anyone know what might be causing this purple tint that is appearing whilst I am texturing?

OK I think it was because I didn’t have a material applied.

Nope problem has returned, but only in object mode.

it probably means that there’s an image missing, so your node setup must be wrong somehow, maybe show a screenshot?

It’s fixed by adding a material. I don’t use nodes yet. Thanks for the reply.