On Aug 27, 12:08 am, Sefu <[email protected]> wrote:
> After a bit of playing around, I finally managed
> to get a few combinatons that resulted in the '#FF0000' pure red I was
> looking for, and also did the decimal conversions:
>
> 0xFFFFFF00 = 4042321920
> 0xF0FF0000 = 4043243520
> 0xF0F0F000 = 4294967040
> 0xFFF00000 = 4293918720
>
> ...I then entered the decimal value in the styledMap 'hue' option, and
> got a pure red in all cases.
>

as a hue of pure red, all these numbers are multiples of 360 degrees

if the numbers are of the form Fxxxxx00, we can factorise this as
15*X*16*16, and since 360 = 15x3x8, then the number is divisible by
360 if X is divisible by 3.

A number is divisible by 3 if the sum of its digits is divisible by 3,
and if the only digits are F or 0, that means there can be either 3 or
6 Fs in the number Fxxxxx00 for the following pure reds:

0xFFFFFF00
0xFF000F00
0xFF00F000
0xFF0F0000
0xFFF00000
0xF0F00F00
0xF0F0F000
0xF0FF0000
0xF00F0F00
0xF00FF000
0xF000FF00

...

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