Light is physically the same as sound except higher pitched (too high for ears).
Green, the colloquial name for waveforms near 570 terahertz, is more treble (a.k.a. colder) than red/orange/yellow, but more bass (a.k.a. warmer) than blue.
The seven colors of the rainbow starting with red is like the seven big keys on a piano starting on A4, except one trillion times higher frequency (ten to the power of twelve).
So warm things (like fire and the sun) are red/orange/yellow, cold things (like the sky and the sea) are blue, and in between is green (like grass, leaves, and seaweed).
In English, there’s more nuance and finer granularity among the names for the warmer colors. Red, orange, and yellow. Swedish doesn’t have a native word for orange. That’s how arbitrary this stuff is.
On the cold side there are words that 99.9% of people (including sighted) won’t be sure of (“indigo”, “navy”, and which is which among “violet” and “purple”).
And, just like note frequency, it’s really a gradient spectrum. People don’t have consensus on where green becomes blue (and where the overlap between them, “teal”, ends or begins).
A piano has more keys above and below just the A4 through G5 octave, and the same goes for light, but humans can’t perceive any of that, at least not without using weird tech like infrared detectors and stuff. So there’s a lot of stuff going on that no-one can see.
Grey is a muddled chord of all colors.
Dark is lower volume (quieter), bright is higher volume (louder).
Black is silence, white is a really loud grey (“white noise” is not a misnomer).
Pink is a bright red. Brown is a dark orange.
Shiny is echo-y and smooth. Dull a.k.a. matte is dampening and textured.
Gold is a shiny brown.
Silver (and steel and aluminum, I can’t tell them apart from silver) is a shiny bright grey.
Iron is a shiny dark grey.
Copper is a shiny orange (turns a dull green with age. I kind of like that).
Translucent is like when you can hear the music through the wall.
Transparent is when you can it so clearly that you can pick out the specific song they’re playing.
Opaque is when the wall blocks the sound.
In the olden days they were satisified with jamming “quote marks” to offset things from normal prose. Then (because of the over-sorting I’m complaining about in my post) they made up a dozen other ways.
Italic means that the lines (that make up the letterforms) are slanted and ornate. (If they’re only slanted, that’s called “oblique”.)
Bold means the lines are thicker and wider.
Serif means more detailed and sans means more stripped down.
Uppercase is a whole other alphabet. If this sounds like a bad idea, it’s because it is. And the uppercase I looks like the lowercase l. Among many other problems. The idea of bold and italic are slightly less messed up than the whole idea of “uppercase” but in pretty much the same ballpark of messed-up–ness—and of course having both is meta–messed-up.