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(Red, Green, Blue, Alpha).
- Development: Extension of RGB to include an alpha channel for transparency control.
- Colors/Units of Measure: Red, Green, Blue, Alpha (opacity).
- Hardware-Based: No, primarily used in software for digital imaging and web design.
- Year of Release: Evolved alongside RGB.
- Founding Institution: Various software companies and research institutions contributed to its development.
- Color Theory: Extension of RGB with transparency control.
- Color Model: Additive color model.
- Total Number of Possible Color Combinations: 16,777,216 (256 levels for each of the three colors), with additional levels for alpha transparency.
- Primary Colors: Red, Green, Blue.
- Secondary Colors: Cyan, Magenta, Yellow.
- Tertiary Colors: Various combinations of the primary and secondary colors.