Most likely
Cyan is missing or weak
Green is printed from cyan and yellow, and blue from cyan and magenta. Without cyan, green falls back to yellow and blue to magenta.
What to do
- Check the cyan ink level or tank.
- Print the cyan test page. Gaps or a pale block confirm it.
- Run a nozzle check, then one cleaning if it shows gaps.
HP nozzle check steps by model, from HP’s manualsEpson nozzle check steps by model, from Epson’s manualsCanon nozzle check steps by model, from Canon’s manualsBrother nozzle check steps by model, from Brother’s manuals
Then reprint: Cyan test page