0x41, 0x53, 0xc0, 0x7e
65, 83, 192, 126


From the Android code we know that raw values are converted first to Kelvins.

A linear equation fits these samples reasonably well, the zero crossing version is probably more correct.
kelvin(x) = 0.0363691 * x
kelvin(x) = -18.763 + 0.0378683*x Kelvin