The Channel dialog lets you manage and pick up new colors. It is divided
into five separate parts: GIMP, CMYK, Triangle, Watercolor and Scales. You
can use the eyedropper, which is the last button of the dialog, to pick up
a color anywhere on your screen.
3.1.1.
Activate Dialog
The dialog can be called in the following ways :
from the toolbox-menu:
File → Dialogs → Colors
from the toolbox: click on the current Foreground or Background
color.
from the image-menu:
Dialogs → Colors
from an other dialog-menu:
Add Tab → Colors
3.1.2.
Using the dialog
The GIMP Selector
With the GIMP
Color Selector, you select a color by clicking on a
one-dimensional strip located at the right edge, and then in a
two-dimensional area located on the left. The one-dimensional
strip can encode any of the color parameters H, S, V, R, G, or B,
as determined by which of the adjoining buttons is pressed. The
two-dimensional area then encodes the two complementary color
parameters.
CMYK
You get to this selector by clicking on the printer icon. The CMYK
view gives you the possibility to manage colors from the
CMYK
color model.
Triangle
The Triangle selector is made up of a
chromatic circle
that allows to select Hue by click-and-drag a small circle and of
a triangle
that has also a small circle to vary intuitively Saturation and
Value.
Watercolor
FIXME
Scales
This Scales exists only in the color selector you get from the
file menu of the Tool-Box or from the Dialogs menu in the image
menu bar.
This selector displays a global view of R, G, B channels and H, S,
V values, placed in sliders.
Color picker
This color picker exists only in the color selector you get from
the file menu of the Tool-Box or from the Dialogs menu in the
image menu bar.
The color picker has a completely different behaviour, than the
color picker tool.
Instead of picking the colors from the active image, you're able
to pick colors from the entire screen.
