USING MICROSOFT POWERPOINT
HOW TO MODIFY YOUR POWERPOINT PRESENTATIONS THEME AND BACKGROUND
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Detailed explanation-1: -PowerPoint offers two options: the RGB (red-green-blue) model and the HSL (hue-saturation-luminosity) model. Each of these uses three values to uniquely identify the color. There are other models and variations in use; you may have encountered HTML or CMYK (used in print work) for example.
Detailed explanation-2: -PowerPoint’s built-in standard color palette gives you 127 colors, plus white, black, and shades of gray to choose from (to read more about combining colors, read this article).
Detailed explanation-3: -What is a PowerPoint theme? A theme is a predefined set of colors, fonts, and visual effects that you apply to your slides for a unified, professional look. Using a theme gives your presentation a harmonious appearance with minimal effort.
Detailed explanation-4: -Select your first slide, and then on the Design tab, select the down arrow in the Variants group. Select Colors, Fonts, Effects, or Background Styles and choose from built-in options or customize your own.