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Simple,don't. Can only speak for myself, but I really don't care.

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Not being rude or anything, but when someone tries explaining what that day's sunrise looks like for example, I just smile and nod to be polite, but really don't care. It's not going to impact my life any. I know they're just trying to be nice, so I respectfully play along, but yeah... my advice is don't worry about it.

You cannot describe the colors themselves, but you can describe the effects colors have, and with what we associate them, socially, energetically, and emotionally.

Socially we use colors to describe intense feelings. “Red hot anger”, “feeling blue”, and “green with envy” are common, but a blind person may not know that the color yellow can be stimulating, suppress the appetite, be a “genderless” color, and be associated with high energy. Or that the lower frequency colors like brown, black, or gray might be associated with slowness or depression.
Hellen Keller commonly used colors in her writings this way.

It could be helpful to break down other characteristics of colors, like vibrancy/intensity and what those mean in certain contexts. With man made things, pastel colors can often indicate age/wear, like a plastic toy faded by the sun, where very vibrant colors can mean “brand new”. But with natural, organic things like animals and plants, the opposite is true. Young, new things are softer colors (think insect eggs, baby animals, young leaf buds) where bright colors signify age and sexual maturity (think butterflies, ripe vegetables, and brightly colored birds).
And then brown, black and dark green are often associated with death and rot.

I also like to think of colors as “high energy” or “low energy”.

Imagine someone handing you a pair of donuts and asking "which of these sounds sourer when you look at it?". Given how many different shades of yellow there are (or any color, for that matter), it's easier if you focus on the unique properties of the object instead of focusing on a descriptor that may not be useful to everyone.

Color is open to wide degrees of interpretation among sighted people anyway (remember the dress?), so just say "this looks like bright/dark/whatever \_\_\_\_\_ to me", if the question comes up. If more details become necessary, narrow it down as you go based on what needs clarifying.

Color is just another form of identification. It’s another layer to different textures or sounds. Things can be smooth or rough, or things can be black or white.

OMG! what a nogin' scratcher...

if there was a way to FEEL colour, that might be helpfull🤔...let alone explain.

Maybe oneday future technology will get there.