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# Selecting a new color

LibreOffice lets you define custom colors using a two-dimensional graphic and numerical gradient chart of the Pick a Color dialog.

若要使用此指令...

Choose Format - Area - Area, press the Color button and click the Pick button.

Press the Color Dialog button in the Illumination tab of the 3D Effects dialog.

## The Pick a Color Window

The GTK and Qt variants of LibreOffice on Linux use native system/toolkit dialogs (which are also used by other applications) by default to pick a color instead of the custom dialog that is described in more detail below. Use of the custom LibreOffice dialog instead of the native one can be enabled in the LibreOffice options.

The Pick a Color dialog consists of four main areas.

- The radio buttons select the color component of the color. This color component can be expressed in either RGB (Red, Green, Blue) or HSB (Hue, Saturation, Brightness) color models. The CMYK color model is not selectable and is provided only to ease the input of color values using CMYK notation.

- The spin buttons are for entering the numerical value of the color component.

- With the vertical color component slider you can modify the value of each component of the color. With the large colored square you can select the color component approximately.

- The horizontal bottom color bar shows the current color and the new color, side by side.

Click in the big color area on the left to select a new color. Using this selector area you can modify two components of the color as represented in the RGB or HSB color models. Note that these are the two components not selected with the radio buttons on the right side of the dialog.

In the right part of the bottom bar, you will see the original color from the parent tab, Colors.

In the left part of the bottom bar, the current result of your work in this dialog is visible.

LibreOffice 僅會使用 RGB 顏色模型進行彩色列印。CMYK 控制項的提供僅為了緩和使用 CMYK 表示法的輸入色值。

## RGB

### 紅色

Sets the Red component modifiable on the vertical color slider, and the Green and Blue components in the two-dimensional color picker field. Allowed values are 0 to 255.

### 綠色

Sets the Green component modifiable on the vertical color slider, and the Red and Blue components in the two-dimensional color picker field. Allowed values are 0 to 255.

### 藍色

Sets the Blue component modifiable on the vertical color slider, and the Green and Red components in the two-dimensional color picker field. Allowed values are 0 to 255.

## Hex #

Displays and sets the color value in the RGB color model expressed as a hexadecimal number.

## HSB

### Hue

Sets the Hue component modifiable on the vertical color slider, and the Saturation and Brightness components in the two-dimensional color picker field. Values are expressed in degrees from 0 to 359.

### 飽和度

Sets the Saturation component modifiable on the vertical color slider, and the Hue and Brightness components in the two-dimensional color picker field. Values are expressed in percent (0 to 100).

### Brightness

Sets the Brightness component modifiable on the vertical color slider, and the Hue and Saturation components in the two-dimensional color picker field. Values are expressed in percent (0 to 100).

## CMYK

### 藍綠色

Set the Cyan color value as expressed in the CMYK color model.

### 紫紅色

Set the Magenta color value as expressed in the CMYK color model.

### 黃色

Set the Yellow color value as expressed in the CMYK color model.

### 鍵碼

Set the Black color value or key (black) as expressed in the CMYK color model.

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