* Returning hex value from rgb combination (each from 0 to 255)
@ 2024-08-31 17:10 Heime
2024-08-31 17:43 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Heime @ 2024-08-31 17:10 UTC (permalink / raw)
To: Heime via Users list for the GNU Emacs text editor
How can I make a function that takes r g and b values (from 0 to 255) and
returns the corresponding hex value ?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Returning hex value from rgb combination (each from 0 to 255)
2024-08-31 17:10 Returning hex value from rgb combination (each from 0 to 255) Heime
@ 2024-08-31 17:43 ` Eli Zaretskii
2024-08-31 17:54 ` Vagn Johansen
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2024-08-31 17:43 UTC (permalink / raw)
To: help-gnu-emacs
> 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"?
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Returning hex value from rgb combination (each from 0 to 255)
2024-08-31 17:43 ` Eli Zaretskii
@ 2024-08-31 17:54 ` Vagn Johansen
2024-08-31 18:24 ` Eli Zaretskii
0 siblings, 1 reply; 6+ messages in thread
From: Vagn Johansen @ 2024-08-31 17:54 UTC (permalink / raw)
To: help-gnu-emacs
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"
--
Vagn Johansen
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Returning hex value from rgb combination (each from 0 to 255)
2024-08-31 17:54 ` Vagn Johansen
@ 2024-08-31 18:24 ` Eli Zaretskii
2024-08-31 18:44 ` Heime
0 siblings, 1 reply; 6+ messages in thread
From: Eli Zaretskii @ 2024-08-31 18:24 UTC (permalink / raw)
To: help-gnu-emacs
> 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.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Returning hex value from rgb combination (each from 0 to 255)
2024-08-31 18:24 ` Eli Zaretskii
@ 2024-08-31 18:44 ` Heime
2024-08-31 21:26 ` Stephen Berman
0 siblings, 1 reply; 6+ messages in thread
From: Heime @ 2024-08-31 18:44 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: help-gnu-emacs
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.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Returning hex value from rgb combination (each from 0 to 255)
2024-08-31 18:44 ` Heime
@ 2024-08-31 21:26 ` Stephen Berman
0 siblings, 0 replies; 6+ messages in thread
From: Stephen Berman @ 2024-08-31 21:26 UTC (permalink / raw)
To: Heime; +Cc: help-gnu-emacs
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
^ permalink raw reply [flat|nested] 6+ messages in thread
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2024-08-31 17:10 Returning hex value from rgb combination (each from 0 to 255) Heime
2024-08-31 17:43 ` Eli Zaretskii
2024-08-31 17:54 ` Vagn Johansen
2024-08-31 18:24 ` Eli Zaretskii
2024-08-31 18:44 ` Heime
2024-08-31 21:26 ` Stephen Berman
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