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Help:RichText editor - Font color
PetroWiki allows you to change the color of text in yourdocuments by using a color palette. To choose a color, select a text fragment and press the button. The Text Color drop-down menu that will open lets you select a color from a basic palette of 40 shades.
If the color that you are after is not included in the basic palette, click the More Colors option in the drop-down menu. The Select color dialog window that will open lets you choose a color from an extended palette. You can either select a desired shade with your mouse or enter the RGB color value into the text box, using one of the following formats:
rgb(nn, nn, nn) format, where nn is a numeric value on a scale from 0 to 255 representing the red, green, and blue channel.
#nnnnnn format, where the n letters stand for the three pairs of hex color values representing the red, green, and blue channel.
A color can be applied to the whole document, a paragraph, or a text fragment of arbitrary length — even a single letter. Do note, however, that for aesthetic and readability reasons it is recommended not to combine too many different colors in one document.