While gray and grey are both correct spellings of the same color, there are rules and customs for when and where gray versus grey can be used.
Gray or Grey: what's the right spelling? - Writer
Gray vs. Grey: How to Choose the Right Word
Gray or Grey - Are Both Correct?
GREY - アニメ
Gray or Grey: what's the right spelling? - Writer
Gray vs. Grey: How to Spell the Word Correctly?
No Words Grey Heart Song Lyric Quote Music Poster Gift
Competitive Abstract Black Tech Geometric Background Stock Illustration - Download Image Now - Black Color, Backgrounds, Gray Background - iStock, black and grey
Gray vs. Grey: How to Choose the Right Word