Contrast

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Object Hierarchy:

Description:

Content:

Constants:

• public const double RATIO_30
• public const double RATIO_45
• public const double RATIO_70
• public const double RATIO_MAX
• public const double RATIO_MIN

Static methods:

• public static double darker (double tone, double ratio)
  Returns tone <= tone parameter that ensures the ratio with the input tone.
• public static double darker_unsafe (double tone, double ratio)
  Tone <= tone parameter that ensures ratio. Returns 0 if ratio cannot be achieved.
• public static double lighter (double tone, double ratio)
  Returns tone >= tone parameter that ensures the ratio with the input tone.
• public static double lighter_unsafe (double tone, double ratio)
  Tone >= tone parameter that ensures ratio. Returns 100 if ratio cannot be achieved.
• public static double ratio_of_tones (double t1, double t2)
  Contrast ratio of two tones (T in HCT, L* in L*a*b*).
• public static double ratio_of_ys (double y1, double y2)
  Contrast ratio is a measure of legibility, used to compare the lightness of two colors.