I wonder if heaven is filled with colors we have never imagined. Oh, surely.
It seems we get hints of heavenly hues, and sounds, and scents, even as we go through life here on earth. Touches of wonder. Little (and sometimes big) miracles that can't be "explained away."
God can "paint" whatever He wants, of course; however and whenever He wishes. He can pick up whatever brush He finds most useful.... sometimes you, sometimes me... and dip us into pigments we've never known. He uses dark hues as well as bright ones. Shadings and shadows we may never have expected.
A brush would make quite a mess if it struggled in the Painter's hands. Oh, but how often I have I been such a one! How often I've pulled away from the Painter! Yet even after that - if I just allow Him to dip me in His cleansing love and mercy, He picks me up and uses me again.
God sees the whole picture of creation.. my life, your life, the world.. He is the One Who knows how it's meant to work together. I pray to be supple and yielding in His hands, allowing Him to make something beautiful of it all.
"God makes all things work together for the good of Those Who love Him, who are called according to His purpose." (Romans 8:28)
"Eye has not seen, ear has not heard, nor has it so much as dawned on man what God has prepared for those who love Him." (1 Corinthians 2:9)