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Colors

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Specifying colors

RGB color model
HSL and HSV representation

Related nodes

Specifiyng Colors
RGB (Color Join)
RGB (Color Join Picker)
RGB (Color Join Vector)

HSV (Color Join)
HSV (Color Join Picker)
HSL (Color Join)

AsColor (String Hex)

Splitting into components
RGB (Color Split)
RGB (Color Split Vector)
HSL (Color Split)
HSV (Color Split)

Colors in vvvv are represented by 4 color components in a range 0..1:

  • R for Red
  • G for Green
  • B for Blue
  • A for Alpha (defines transparency)

There is also another way to represent a color in RGB space, which is typically more intuitive to adjust:

  • HSL (Hue, Saturation, Lightness)
  • HSV (Hue, Saturation, Value) aka HSB.

The IOBox (Color) uses the HSV representation by default, see Color IOBoxes.

Note, other software packages can specify individual components in another ranges:

  • RGB: 0..255 for the Color channels and 0..100% for the Alpha
  • HSL: 0..360° for the Hue and 0..100% for the Saturation and Lightness.

Don't forget to convert the values to the 0..1 range.
There are convenient RGB (Color Join Picker), HSV (Color Join Picker)and AsColor (String Hex) for helping. Or just type the expression like 270/360 into the IOBox to convert 207° of Hue into 0..1 range.

Saving / sending colors

Related nodes

AsString (Color Hex)
AsString (Color)
AsRaw (Color)
RGB (Color Split Vector)

AsColor (String Hex)
AsColor (String)
AsRaw (String)
RGB (Color Join Vector)

When you need to save / load a color to a file or send / receive it over the network it has to be represented as a String or Raw data.

Color Manipulation

Related nodes

- (Color)
+ (Color)
* (Color)
= (Color)
RGB (Transform)
HSL (Transform)
Blend (Color)
InputMorph (Color)

Colors in vvvv can be compared, transformed and interpolated.

See also:

Color Space conversion

Related nodes

HSLtoHSV (Color)
HSVtoHSL (Color)

These nodes are little helpers to convert between HSL and HSV spaces.

Palettes

How to Choose Colours Procedurally

Related nodes

RetroColors (Color)
Windows98Colors (Color)
NetscapeColors (Color)
Spectrum (Color)

See also:

Down the rabbit hole

Khan Academy - Pixar in a Box, Color science
Charles Poynton - Color technology
John Novak - What every coder should know about gamma
Bjango - Color management

External sites providing further info on color, color spaces and color management.



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Shoutbox

~1d ago

joreg: absolutely. if it is for a repo that is public, just submit a pullrequest. otherwise please start a forum thread.

~1d ago

benjawmino: @joreg I ended up figuring out BezierSegment yesterday, so nevermind! Tell me, could a user submit a help patch? :)

~1d ago

joreg: @benjawmino please elaborate on this question a bit in a new forum thread. otherwise it is hard to answer..

~3d ago

benjawmino: so are there no splines/curves in gamma yet??

~6d ago

skyliner: wanna do drone shows or applications? then check this super cool project of our man e1n

~11d ago

NoseBleedIndustries: Thanks Joreg! The few minutes I was able to see, very good workshops!

~11d ago

joreg: @NoseBleedIndustries please give us some days, we'll have an announcement soon...

~11d ago

NoseBleedIndustries: I could not assist the Node20 (workshops ) Any Idea when we will have access to the links of the recordings?

~12d ago

bjoern: unity has c# bindings for usd, under apache license: https://github.com/Unity-Technologies/usd-unity-sdk