Re: Returning hex value from rgb combination (each from 0 to 255)

[Stephen Berman <stephen.berman@gmx.net>]

On Sat, 31 Aug 2024 18:44:22 +0000 Heime <heimeborgia@protonmail.com> wrote:

> On Sunday, September 1st, 2024 at 6:24 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> > From: Vagn Johansen gonz808@hotmail.com
>> > Date: Sat, 31 Aug 2024 19:54:49 +0200
>> >
>> > Eli Zaretskii eliz@gnu.org writes:
>> >
>> > > > Date: Sat, 31 Aug 2024 17:10:27 +0000
>> > > > From: Heime heimeborgia@protonmail.com
>> > > >
>> > > > How can I make a function that takes r g and b values (from 0 to 255) and
>> > > > returns the corresponding hex value ?
>> > >
>> > > What is "the corresponding hex value"?
>> >
>> > Probably the format used by color-rgb-to-hex
>> >
>> > (color-rgb-to-hex 1 0 0 2) => "#ff0000"
>>
>>
>> Then he had better used (color-rgb-to-hex 1 0 0) instead, as 2 digits
>> per component will get him in trouble eventually.
>
> But this requires values from 0.0 to 1.0 rather than from 0 to 255.

So define a function that takes integer RGB values between 0 and 255 and
divide them by 255.0 before passing them to color-rgb-to-hex.

Steve Berman