You can set the current color by selecting a color from the color palettes, editing the current color using the range fields, or by grabbing a color from anywhere on the screen.
Adjust the RGB sliders or enter the RGB values in the RGB numeric fields.
Adjust the HSV sliders or enter the HSV values in the HSV numeric fields.
Click in the color blending palette to select that color. If you click-drag within the palette, the current color updates interactively.
You cannot use this method to grab a color from a Show Image (that is, an image file that you are viewing using File > Show Image ) because the image’s window will close when you click it. Use the following method, instead.
The grabbed color becomes the current color.
Click the Undo button.
The active parameter’s color is reset to the setting the parameter had when you first opened the Color Editor (or if the Color Editor was already open, when you first selected the environment, shader, texture, or light, or first selected the parameter).