#642C79
Closest named color: Rebecca Purple (#663399). oklch(40.6% 0.134 315.7), rgb(100, 44, 121).
Aa
White text reads best on this color (9.64:1).
About this color
#642C79 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.134 and its hue 316°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.054 away. White text reads best on it, at 9.64:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.134) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #642C79 |
| RGB | rgb(100, 44, 121) |
| HSL | hsl(284, 47%, 32%) |
| OKLCH | oklch(40.6% 0.134 315.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #642C79 | 9.64:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #642C79 | 2.17:1 | Fails | Lc 12.1 | Not readable |
| #642C79 text on white | 9.64:1 | AAA | Lc 91.8 | Preferred for body text |
| #642C79 text on black | 2.17:1 | Fails | Lc -10.6 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F8F3FA
oklch(97% 0.011 316.5)
-
Step 100
100
#F0E6F4
oklch(93.7% 0.021 316.5)
-
Step 200
200
#E5D1ED
oklch(88.5% 0.043 316.4)
-
Step 300
300
#D4B2E3
oklch(80.9% 0.077 315.4)
-
Step 400
400
#BF87D5
oklch(70.7% 0.126 316.1)
-
Step 500
500
#AE67CA
oklch(63.1% 0.16 315.7)
-
Step 600
600
#994CB7
oklch(55.7% 0.173 315.5)
-
Step 700
700
#833C9D
oklch(49.1% 0.161 315.9)
-
Step 800
800 (this color)
#642C79
oklch(40.6% 0.134 315.7)
-
Step 900
900
#562D66
oklch(37.6% 0.104 315.7)
-
Step 950
950
#331B3C
oklch(27% 0.066 316.2)
#642C79 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #13417B | 0.126 |
| Deuteranopia (no green cones) | #2C4677 | 0.109 |
| Tritanopia (no blue cones) | #633A4E | 0.088 |
| Achromatopsia (no color) | #454545 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642C79
#642C79
oklch(40.6% 0.134 315.7)
- #285700
#285700
oklch(40.7% 0.12 135.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #642C79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.067
- Purple #800080 ΔE 0.071
- Rich Purple #720058 ΔE 0.078
- Grape Purple #5D1451 ΔE 0.079
- Blueberry #464196 ΔE 0.082
- Velvet #750851 ΔE 0.084
- Indigo #4B0082 ΔE 0.089
Use #642C79 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.