Touring the Interface with a Basic Composite - Nuke 101: Professional Compositing and Visual Effects - page 61

Thenexttwooptionsreferonlytocolor-relatedpropertiesthathaveaSamplecolorbutton
and a Color picker button.
•UsetheSamplecolorfromtheViewerbutton.BysamplingcolorsfromtheViewer,
you can change the value of the color property. To do so, click the Sample color
button to turn it on and then hold Ctrl/Cmd and drag the screen to pick a color.
Thiswillchangethevalueofyourpropertytomirrorthevalueofthepickedcolor.
When you are finished picking colors, click the Sample color button to turn it off
(to make sure you don't accidentally pick colors from the Viewer).
• Use the Color picker.
Using the Color Wheel and Color Sliders panel
The Color Wheel and Color Sliders panel is a great tool for working with color. It is in-
voked every time the Color Wheel icon is clicked, whether it be as part of a color correc-
tion node, changing the color in part of the interface, or anything else that needs a color
selected ( FIGURE 2.29 ).
Figure 2.29. Use the color wheel to choose a color.