Convert HEX to RGB

[Bruno Malvestuto]

How i can convert hex to rgb?

 

[Chad Perrin]

How i can convert hex to rgb?

Hex is RGB.

#ff0000 = r:255 g:0 b:0

I'm not entirely sure what you're asking.

 

[Ben Bleything]

How i can convert hex to rgb?

Do you mean a hex color code like #ffccff to RGB values like:

R: 255
G: 204
B: 255

?

The first two characters of the hex color code are the red value, the
second pair the green, and the final pair the blue value. Grab those
three substrings, convert the hex to decimal, and you're golden.

"#ffccff".match /#(..)(..)(..)/

puts "R: #{m[1].hex}"
puts "G: #{m[2].hex}"
puts "B: #{m[3].hex}"

That's not going to work in all cases (for instance, it's legal to do
#fff if you mean #ffffff), but it should get you started

Ben

 

[Austin Ziegler]

On Thu, Aug 10, 2006, Bruno Malvestuto wrote:
"#ffccff".match /#(..)(..)(..)/

puts "R: #{m[1].hex}"
puts "G: #{m[2].hex}"
puts "B: #{m[3].hex}"

That's not going to work in all cases (for instance, it's legal to do
#fff if you mean #ffffff), but it should get you started

Better yet, use color-tools (gem i color-tools). This is currently
part of the Ruby PDF project, but it will be moving to the "color"
project in due course.

-austin

 

[Martin DeMello]

How i can convert hex to rgb?

hex = 0xffeedd
rgb = {}
%w(r g b).inject(hex) {|a,i| rest, rgb = a.divmod 256; rest}
p rgb

martin

 

[Avram Dorfman]

Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

(not that anybody is still watching this thread, but I figured I'd ask)

How i can convert hex to rgb?

hex = 0xffeedd
rgb = {}
%w(r g b).inject(hex) {|a,i| rest, rgb = a.divmod 256; rest}
p rgb

martin

 

[Avram Dorfman]

Ok, answered my own question. Figured I'd post incase anyone else is
searching for this:

"ff".hex
=>255

Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

(not that anybody is still watching this thread, but I figured I'd ask)

How i can convert hex to rgb?

hex = 0xffeedd
rgb = {}
%w(r g b).inject(hex) {|a,i| rest, rgb = a.divmod 256; rest}
p rgb

martin

 

[Eustáquio 'TaQ' Rangel]

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Hash: SHA1

Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

Gimme a good and old blue RGB:
=> [16, 26, 255]

- --
Eustáquio "TaQ" Rangel
http://eustaquiorangel.com

"Imagination is more important than knowledge."
A. Einstein
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=s76P
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[Avram Dorfman]

Sweet. That is *so* much more readable. Thank you.

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Hash: SHA1

Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

Gimme a good and old blue RGB:
=> [16, 26, 255]

 

[Jeremy Hinegardner]

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Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

Gimme a good and old blue RGB:
=> [16, 26, 255]

Or use color (http://rubyforge.org/projects/color/)

require 'rubygems'
require 'color'

c = Color::RGB.from_html("101aff")
c.css_rgb # => rgb(6.27%, 10.20%, 100.00%)
[c.red, c.green, c.blue] # => [16.0, 26.0, 255.0]

enjoy,

-jeremy

 

[Austin Ziegler]

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Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

Gimme a good and old blue RGB:

"101aff".scan(/../).map {|color| color.to_i(16)}

=> [16, 26, 255]

Or use color (http://rubyforge.org/projects/color/)

require 'rubygems'
require 'color'

c = Color::RGB.from_html("101aff")
c.css_rgb # => rgb(6.27%, 10.20%, 100.00%)
[c.red, c.green, c.blue] # => [16.0, 26.0, 255.0]

Why thank you, Jeremy.

What's beautiful about the Color rubygem is that it's a lot more than
just RGB, too. Much much more.

-austin, thinking he should try to conscript Jeremy into helping out
with Color again...

 

[Jeremy Hinegardner]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Ummm... This is a really clever solution, except if you have a hex value
that you need to convert into an rgb array, it is probably a string, not
an integer literal. Is there an easy way to convert a hex string
directly into an integer literal?

Gimme a good and old blue RGB:

"101aff".scan(/../).map {|color| color.to_i(16)}
=> [16, 26, 255]

Or use color (http://rubyforge.org/projects/color/)

require 'rubygems'
require 'color'

c = Color::RGB.from_html("101aff")
c.css_rgb # => rgb(6.27%, 10.20%, 100.00%)
[c.red, c.green, c.blue] # => [16.0, 26.0, 255.0]

Why thank you, Jeremy.

What's beautiful about the Color rubygem is that it's a lot more than
just RGB, too. Much much more.

-austin, thinking he should try to conscript Jeremy into helping out
with Color again...

Yup, count me in.

enjoy,

-jeremy