macOS Semantic Colors

SemanticColors.txt

Note:
1) These may change in future versions of macOS.
2) Apple may also add more appearances or control accent colors in the future.
3) You probably don't want to hardcode color values.
4) Watch:
   https://developer.apple.com/videos/play/wwdc2018/210
   https://developer.apple.com/videos/play/wwdc2018/218

All colors specified in the sRGB color space.

Format:
(Appearance): (RGB Hex Color) - (Alpha value) - (Hue) (Saturation) (Brightness)
  
labelColor
  Aqua:  #000000 - A:  85% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  85% - HSB:   0°,   0%, 100%

secondaryLabelColor
  Aqua:  #000000 - A:  50% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  55% - HSB:   0°,   0%, 100%

tertiaryLabelColor
  Aqua:  #000000 - A:  25% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  25% - HSB:   0°,   0%, 100%

quaternaryLabelColor
  Aqua:  #000000 - A:  10% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  10% - HSB:   0°,   0%, 100%

linkColor
  Aqua:  #0068da - A: 100% - HSB: 211°, 100%,  85%
  Dark:  #419cff - A: 100% - HSB: 211°,  75%, 100%

placeholderTextColor
  Aqua:  #000000 - A:  25% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  50% - HSB:   0°,   0%, 100%

windowFrameTextColor
  Aqua:  #000000 - A:  85% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  85% - HSB:   0°,   0%, 100%

selectedMenuItemTextColor
  Aqua:  #ffffff - A: 100% - HSB:   0°,   0%, 100%
  Dark:  #ffffff - A: 100% - HSB:   0°,   0%, 100%

alternateSelectedControlTextColor
  Aqua:  #ffffff - A: 100% - HSB:   0°,   0%, 100%
  Dark:  #ffffff - A: 100% - HSB:   0°,   0%, 100%

headerTextColor
  Aqua:  #000000 - A:  85% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A: 100% - HSB:   0°,   0%, 100%

separatorColor
  Aqua:  #000000 - A:  10% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  10% - HSB:   0°,   0%, 100%

gridColor
  Aqua:  #000000 - A:  10% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A:  10% - HSB:   0°,   0%, 100%

windowBackgroundColor
  Aqua:  #ececec - A: 100% - HSB:   0°,   0%,  93%
  Dark:  #323232 - A: 100% - HSB:   0°,   0%,  20%

controlBackgroundColor
  Aqua:  #ffffff - A: 100% - HSB:   0°,   0%, 100%
  Dark:  #1e1e1e - A: 100% - HSB:   0°,   0%,  12%

selectedContentBackgroundColor
  Aqua:  #e6bc17 - A: 100% - HSB:  48°,  90%,  90%
  Dark:  #e6c420 - A: 100% - HSB:  50°,  86%,  90%

unemphasizedSelectedContentBackgroundColor
  Aqua:  #dcdcdc - A: 100% - HSB:   0°,   0%,  86%
  Dark:  #464646 - A: 100% - HSB:   0°,   0%,  27%

findHighlightColor
  Aqua:  #ffff00 - A: 100% - HSB:  60°, 100%, 100%
  Dark:  #ffff00 - A: 100% - HSB:  60°, 100%, 100%

textColor
  Aqua:  #000000 - A: 100% - HSB:   0°,   0%,   0%
  Dark:  #ffffff - A: 100% - HSB:   0°,   0%, 100%

textBackgroundColor
  Aqua:  #ffffff - A: 100% - HSB:   0°,   0%, 100%
  Dark:  #1e1e1e - A: 100% - HSB:   0°,   0%,  12%

selectedTextColor
  Aqua:  #000000 - A: 100% - HSB:   0°, 100%,   0%
  Dark:  #ffffff - A: 100% - HSB:   0°, 100%, 100%

selectedTextBackgroundColor
  Aqua:  #ffeaa9 - A: 100% - HSB:  46°,  34%, 100%
  Dark:  #987c09 - A: 100% - HSB:  48°,  94%,  60%

unemphasizedSelectedTextBackgroundColor
  Aqua:  #dcdcdc - A: 100% - HSB:   0°,   0%,  86%
  Dark:  #464646 - A: 100% - HSB:   0°,   0%,  27%

unemphasizedSelectedTextColor
  Aqua:  #000000 - A: 100% - HSB:   0°, 100%,   0%
  Dark:  #ffffff - A: 100% - HSB:   0°, 100%, 100%

systemRedColor
  Aqua:  #ff3b30 - A: 100% - HSB:   3°,  81%, 100%
  Dark:  #ff453a - A: 100% - HSB:   3°,  77%, 100%

systemGreenColor
  Aqua:  #28cd41 - A: 100% - HSB: 129°,  80%,  80%
  Dark:  #32d74b - A: 100% - HSB: 129°,  77%,  84%

systemBlueColor
  Aqua:  #007aff - A: 100% - HSB: 211°, 100%, 100%
  Dark:  #0a84ff - A: 100% - HSB: 210°,  96%, 100%

systemOrangeColor
  Aqua:  #ff9500 - A: 100% - HSB:  35°, 100%, 100%
  Dark:  #ff9f0a - A: 100% - HSB:  36°,  96%, 100%

systemYellowColor
  Aqua:  #ffcc00 - A: 100% - HSB:  48°, 100%, 100%
  Dark:  #ffd60a - A: 100% - HSB:  50°,  96%, 100%

systemBrownColor
  Aqua:  #a2845e - A: 100% - HSB:  34°,  42%,  64%
  Dark:  #ac8e68 - A: 100% - HSB:  34°,  40%,  67%

systemPinkColor
  Aqua:  #ff2d55 - A: 100% - HSB: 349°,  82%, 100%
  Dark:  #ff375f - A: 100% - HSB: 348°,  78%, 100%

systemPurpleColor
  Aqua:  #5856d6 - A: 100% - HSB: 241°,  60%,  84%
  Dark:  #6260e0 - A: 100% - HSB: 241°,  57%,  88%

systemGrayColor
  Aqua:  #8e8e93 - A: 100% - HSB: 240°,   3%,  58%
  Dark:  #98989d - A: 100% - HSB: 240°,   3%,  62%

controlAccentBlueColor
  Aqua:  #007aff - A: 100% - HSB: 211°, 100%, 100%
  Dark:  #007aff - A: 100% - HSB: 211°, 100%, 100%

controlAccentRedColor
  Aqua:  #e0383e - A: 100% - HSB: 358°,  75%,  88%
  Dark:  #f23d43 - A: 100% - HSB: 358°,  75%,  95%

controlAccentOrangeColor
  Aqua:  #f7821b - A: 100% - HSB:  28°,  89%,  97%
  Dark:  #f7821b - A: 100% - HSB:  28°,  89%,  97%

controlAccentYellowColor
  Aqua:  #fcb827 - A: 100% - HSB:  41°,  85%,  99%
  Dark:  #fcb827 - A: 100% - HSB:  41°,  85%,  99%

controlAccentGreenColor
  Aqua:  #62ba46 - A: 100% - HSB: 106°,  62%,  73%
  Dark:  #62ba46 - A: 100% - HSB: 106°,  62%,  73%

controlAccentPurpleColor
  Aqua:  #953d96 - A: 100% - HSB: 299°,  59%,  59%
  Dark:  #953d96 - A: 100% - HSB: 299°,  59%,  59%

controlAccentPinkColor
  Aqua:  #f74f9e - A: 100% - HSB: 332°,  68%,  97%
  Dark:  #f74f9e - A: 100% - HSB: 332°,  68%,  97%

controlAccentNoColor
  Aqua:  #989898 - A: 100% - HSB:   0°,   0%,  60%
  Dark:  #8c8c8c - A: 100% - HSB:   0°,   0%,  55%