You might already know this, but the original emoji is from Twemoji, CC BY 4.0. I am obliged to say that, legally, if you use one of these emoji, you should attribute them. Attributing me would be nice too, I guess. Bits of code and equations from Bruce Lindbloom, the CSS Color Module Level 4, by Lea Verou, etc.

This stuff probably only works on modern browsers.

Saturation (/Chroma)
Chroma clipped?
Presets (the saturated reds are matched to my scalesona, because I can):
HSL, arbitrarily picked
LCHab, ≈🐉-matched
LCHab, chroma 71.2
LCHuv, ≈🐉-matched
LCHuv, high chroma