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The "CSS color formats" Lesson is part of the full, CSS3 In-Depth course featured in this preview video. Here's what you'd learn in this lesson:
There are a variety of color formats in CSS include hexadecimal, RGB, RGBA, HSA, and HSLA. The “A” in RGBA and HSLA stands for “alpha” or transparency. HSL stands for hue, saturation, and luminosity. It’s a more intuitive way to select and alter colors as opposed to hexadecimal.