9.1 Color terminology9.1.1 Shade, tints, and tones9.1.2 Warm vs. cool colors9.1.3 Hue, saturation, and lightness9.2 The color wheel9.2.1 Color relationships9.2.2 Study examples of color, and then study some more9.3 Color psychology9.4 Picking and applying a color scheme9.5 Tutorial: Pick a color scheme, and apply it9.6 Accessibility considerations9.6.1 Testing color contrast9.6.2 Don’t rely only on color to indicate a state or status9.7 Web color modes9.7.1 RGB and RGBA9.7.2 Hexadecimal9.7.3 HSL and HSLA9.7.4 CIE Lab and LCH9.7.5 Which color mode should I use?9.8 Color discrepancies on screensSummary