gray: A value in the grey scale between 0 and 1.cmyk: Is specified as four comma-separated values between 0 and 1 that determine the amount of cyan, magenta, yellow and black (in this order) to be added using the additive model in most printers.RGB: The same as before but with the values going between 0 and 255.rgb: Is specified as three comma-separated values between 0 and 1 that represent the amount of red, green and blue (in this order) that the color has.
The most common color models and their definition syntax are the To define it and color definition is the definition according to the selected Where name is the name which will take the color, model is the model used
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In the following example, we show how to get all these combinations: % Bold, Italics and underline text in Beamer For instance, the combination of bold and italics is not available for the default font, but it can be used if you change the font encoding to T1 or load the lmodern package to use the Latin Modern font family. But in this case, we have to be sure that the combination exists for the font used. They can also be combined to produce bold italic text, or underlined bold text, etc. In beamer we can print bold, italized and underlined text using the commands \textbf, \textit and \underline, respectively. Simple text formatting is commonly used in documents to highlight special pieces of text, like the important concepts or definitions, making the document more readable.