simple past tense and past participle of fade
"The vibrant colors on her old summer dress have faded after being left in the sun all week."
having lost freshness or brilliance of color
"sun-bleached deck chairs"
"faded jeans"
"a very pale washed-out blue"
"washy colors"
That has lost some of its former colour or intensity.
"The old photograph had faded after sitting in the sun for too long, making the bright blue sky look like a dull gray."