I had this problem too, with my Canon printer. You could check your ink cartridges and look for yellow in blue, etc. If you have a refillable tank, refill it with the color that is the color of the cartridge. If a non- refillable tank, replace it with the same color of the cartridge.
I know, It is mixed colors in the ink cartridge. To fix, buy or order your new ink cartridges, or if you have some more boxes, place the new cartridges in and the mixed cartridges out. I learned this here today.