HTML TUTORIALS
Online Tool: Color Color Selector
The HEX, RGB, HSL & Alpha Color Picker is a free online tool that lets you easily pick colors from the palettes or manually enter values. This color picker supports HEX, RGB, and HSL values, as well as the alpha channel, including 8-digit HEX alpha values.
See Also:
Color Format Converter
px-pt-%-rem Units Calculator
HTML Editor
Color Tint & Shade Generator
Color Scheme Designer
CSS Gradient Tool
References: