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3.
Image-content Related Dialogs
3.1. The “FG/BG Color” Dialog
The Color dialog lets you manage and pick up new colors. You can use it
into five different modes: GIMP, CMYK, Triangle, Watercolor and Scales. It
has an interesting eyedropper to pick up a color anywhere on your screen.
The dialog called from the FG/BG area in the toolbox is a bit different
compared to the one called from the image menu:
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the sliders are permanently visible instead of selected from the
scale menu,
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twelve buttons show the last used colors. You may choose
a color by clicking on one of these buttons or add the current FG
or BG color to this history list.
This dialog works either on the foreground or the background color.
3.1.1. Activating the Dialog
The “Colors” dialog is a dockable dialog; see the
section Section 2.3, “Dialogs and Docking” for help on manipulating
it.
You can access it:
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from an image menu:
→ → ;
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from the Tab menu in any dockable dialog by clicking on
and selecting
→ ,
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from the toolbox: click on the current Foreground or Background
color.
In the menu, there is a list of
detached windows which exists
only if at least one dialog remains open. In this case, you can raise
the “Colors” dialog from the image-menu:
→ .
3.1.2. Using the “FG/BG color” dialog
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GIMP Selector
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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.
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CMYK
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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.
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Triangle
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This selector uses the
HSV
color
model. Click in the chromatic circle and drag
the mouse pointer to select the Hue. Click-and-drag in the
triangle to vary intuitively Saturation
(vertically) and Value (horizontally).
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Watercolor
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This color selector is symbolized by a brush. The function mode of
this selector is a little different from that of models
presented so far. The principle consists in changing the
current foreground color by clicking in the rectangular
palette. If the current foreground color is for example
white, then it turns to reddish by clicking in the red
color area. Repeated clicking strengthens the effect. With the
slider, which is right apart from the color palette, you
can set the color quantity per every mouse click. The higher the
sliding control is, the more color is taken up per click.
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Palette
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This color selector brings up a list of the colors of the current
palette in the
Palettes dialog .
You can set GIMP's foreground or background
colors by clicking on colors in the colors display. You can also
use the arrow keys to move within the list of colors.
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Scales
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This selector displays a global view of R, G, B channels and H, S,
V values, placed in sliders.
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Color picker
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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.
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HTML Notation
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See HTML notation.
You can also use the CSS keywords; enter the first letter of a
color to get a list of colors with their keyword :
Right-clicking in the HTML Notation text box opens a context
menu that allows you to edit your notation, particularly to
paste a complex notation you have copied elsewhere. This menu
leads to various Input Methods that allow
you to use foreign characters, and to the possibility to
Insert Unicode Control Characters. This is
a vast field, beyond this help. Please see
[UNICODE].
Right up you find a symbol, consisting of two arrows, with which you can
exchange the foreground and background colour. At the bottom left of the
dialog, just below the foreground color block, you find a switching
surface with two small, one black and the other white, partially
overlapping squares. If you click on these, the front and background
colour are put back to black and white respectively.
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