Oh Grace.....Heaven couldn't be just ONE color. Quite the contrary. Heaven must be every color, shade, hue and brightness possible!!! Hundreds of colors!!
In order to create a vision of Heaven, it would be necessary for especially-gifted artists to ban together by the dozens and bring all their pallets of gem-infused paints and chalks & brushes of silk....while God directs their movements & all the Angels sing!
That might just be glorious enough!