#642C71
Closest named color: Rebecca Purple (#663399). oklch(40% 0.125 319.7), rgb(100, 44, 113).
Aa
White text reads best on this color (9.81:1).
About this color
#642C71 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.125 and its hue 320°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.067 away. White text reads best on it, at 9.81:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.14:1 |
| White text | 9.81:1 |
Values
| HEX | #642C71 |
| RGB | rgb(100, 44, 113) |
| HSL | hsl(289, 44%, 31%) |
| OKLCH | oklch(40% 0.125 319.7) |
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 #642C71 | 9.81:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #642C71 | 2.14:1 | Fails | Lc 11.7 | Not readable |
| #642C71 text on white | 9.81:1 | AAA | Lc 92.3 | Preferred for body text |
| #642C71 text on black | 2.14:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#F9F3FB
oklch(97.1% 0.012 317.7)
-
Step 100
100
#F2E4F6
oklch(93.5% 0.028 318.7)
-
Step 200
200
#E9CFEF
oklch(88.6% 0.051 319.9)
-
Step 300
300
#DCADE7
oklch(80.9% 0.095 319.8)
-
Step 400
400
#C97FDB
oklch(70.7% 0.151 319.6)
-
Step 500
500
#BA5AD0
oklch(63% 0.192 319.8)
-
Step 600
600
#A53BBD
oklch(55.6% 0.208 319.6)
-
Step 700
700
#8E2BA3
oklch(49.1% 0.194 320)
-
Step 800
800
#732684
oklch(42.7% 0.16 319.8)
-
Step 900
900 (this color)
#642C71
oklch(40% 0.125 319.7)
-
Step 950
950
#37173E
oklch(27% 0.079 320.2)
#642C71 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) | #1D4073 | 0.119 |
| Deuteranopia (no green cones) | #31466F | 0.105 |
| Tritanopia (no blue cones) | #64374A | 0.078 |
| Achromatopsia (no color) | #444444 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642C71
#642C71
oklch(40% 0.125 319.7)
- #195704
#195704
oklch(40.1% 0.126 139.9)
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 #642C71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.067
- Grape Purple #5D1451 ΔE 0.068
- Rich Purple #720058 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.074
- Velvet #750851 ΔE 0.074
- Purple #800080 ΔE 0.075
- Blueberry #464196 ΔE 0.090
- Royal Purple #4B006E ΔE 0.092
Use #642C71 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.