Abbreviations in effects

[Opto]

For example, a string with an effect: Solid Pattern

static const char _data_FX_MODE_STATIC_PATTERN[] PROGMEM = "Solid Pattern@Fg size,Bg size;Fg,!;!;;pal=0";

What do abbreviations Fg, Bg, Fx means?
Fx, or fixed is it just a color?
Bg, or background is it a background color?
Fg - there is not even an assumption.

[Jinx]

Fx: Effects
Bg: Background
Fg: Foreground

I think.

[Opto]

@Jinx

Fx: Effects

This is usually one of the colors used by the effect, but not the effect itself.

@Jinx

Fg: Foreground

it seems to be true

[Opto]

file index.js

else if (i==0) btn.innerHTML = "Fx";
			else if (i==1) btn.innerHTML = "Bg";
			else btn.innerHTML = "Cs";

Whats mean Cs, custom?

[kilrah]

https://kno.wled.ge/features/effects/

[Opto]

Thank you very much!