#642D73
Closest named color: Rebecca Purple (#663399). oklch(40.3% 0.126 318.5), rgb(100, 45, 115).
Aa
White text reads best on this color (9.70:1).
About this color
#642D73 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.126 and its hue 319°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.063 away. White text reads best on it, at 9.70:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #642D73 |
| RGB | rgb(100, 45, 115) |
| HSL | hsl(287, 44%, 31%) |
| OKLCH | oklch(40.3% 0.126 318.5) |
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 #642D73 | 9.70:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #642D73 | 2.16:1 | Fails | Lc 11.9 | Not readable |
| #642D73 text on white | 9.70:1 | AAA | Lc 92.0 | Preferred for body text |
| #642D73 text on black | 2.16:1 | Fails | Lc -10.4 | 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
#F0E6F3
oklch(93.7% 0.02 318.4)
-
Step 200
200
#E5D1EB
oklch(88.5% 0.041 318.4)
-
Step 300
300
#D5B2DF
oklch(80.9% 0.073 318.6)
-
Step 400
400
#C088D0
oklch(70.7% 0.119 318.6)
-
Step 500
500
#AF69C3
oklch(63.2% 0.149 318.4)
-
Step 600
600
#9A4EAF
oklch(55.6% 0.162 318.5)
-
Step 700
700
#843E97
oklch(49.2% 0.152 318.6)
-
Step 800
800 (this color)
#642D73
oklch(40.3% 0.126 318.5)
-
Step 900
900
#572E62
oklch(37.7% 0.098 318.8)
-
Step 950
950
#331C3A
oklch(27.1% 0.062 318)
#642D73 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) | #1C4175 | 0.119 |
| Deuteranopia (no green cones) | #314671 | 0.103 |
| Tritanopia (no blue cones) | #64384B | 0.080 |
| Achromatopsia (no color) | #444444 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642D73
#642D73
oklch(40.3% 0.126 318.5)
- #1D5700
#1D5700
oklch(40.2% 0.126 138.6)
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 #642D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.071
- Grape Purple #5D1451 ΔE 0.072
- Rich Purple #720058 ΔE 0.073
- Purple #800080 ΔE 0.075
- Velvet #750851 ΔE 0.077
- Blueberry #464196 ΔE 0.087
- Royal Purple #4B006E ΔE 0.094
Use #642D73 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.