What if space isn't black, but instead full of colors we can't perceive

Have you ever seen xray/infrared pictures of space? It is

There's a Lovecraft book about some colours out of space.

I want this to be my phone background T-T

It is a rich cacophony of "colors" we can't see, you must remember that visible light is only 0.1% of the electromagnetic spectrum.
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We can't see most of any part of the universe. The light we DO see, only accounts for just under 5% of the total mass of the universe. ~25% is Dark Matter and ~70% is Dark Energy... neither of which we know what it is.

Look at the sky. It's not dark and black and without character. The black is, in fact deep blue. And over there: lighter blue and blowing through the blues and blackness the winds swirling through the air and then shining, burning, bursting through: the stars! And you see how they roar their light. Everywhere we look, the complex magic of nature blazes before our eyes.
-Vincent Van Gogh from Doctor Who

is that what drugs are like