Weekly Challenge "My Fav Meaowsic Album"
Last LP of the Beagles : Let it bark (1970)

https://en.wikipedia.org/wiki/Let_It_Be_(album)

STEPS

320X320 - 16 colors in 12 bits color space (RGB444 - 4096 colors max)
The center of the image is 256X256 and can be displayed in PAL low resolution mode on a stock Amiga 1000 (year 1985) + C.R.T tv set.
Or the whole image on high resolution PAL 640X512
Little vertical distortion because 1:1 pixel ratio would be 320X240 or 640X480

12bits: RGB444
16 levels by component r,g,b
4096 colors
hex value has 3 nibbles
#f96

24bits: RGB888
256 levels by component r,g,b
167770216 colors (16,7 million)
hex value has 6 nibbles
#fe95a8

To use 12 bits colors on 24 bits color space :
Just double each nibble.
ex: #9fb becomes #99ffbb
ex: #e02 becomes #ee0022

A nibble is 4 bits, half of a byte, 0 to f in hexadecimal.