#642C78
Closest named color: Rebecca Purple (#663399). oklch(40.5% 0.133 316.2), rgb(100, 44, 120).
Aa
White text reads best on this color (9.66:1).
About this color
#642C78 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.133 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 0.055 away. White text reads best on it, at 9.66:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.17:1 |
| White text | 9.66:1 |
Values
| HEX | #642C78 |
| RGB | rgb(100, 44, 120) |
| HSL | hsl(284, 46%, 32%) |
| OKLCH | oklch(40.5% 0.133 316.2) |
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 #642C78 | 9.66:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #642C78 | 2.17:1 | Fails | Lc 12.1 | Not readable |
| #642C78 text on white | 9.66:1 | AAA | Lc 91.9 | Preferred for body text |
| #642C78 text on black | 2.17:1 | Fails | Lc -10.5 | 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
#D5B2E3
oklch(81% 0.077 316.2)
-
Step 400
400
#BF87D4
oklch(70.6% 0.125 316.5)
-
Step 500
500
#AE67C9
oklch(63.1% 0.159 316.1)
-
Step 600
600
#994CB6
oklch(55.6% 0.172 315.8)
-
Step 700
700
#833C9C
oklch(49.1% 0.16 316.3)
-
Step 800
800 (this color)
#642C78
oklch(40.5% 0.133 316.2)
-
Step 900
900
#572D66
oklch(37.7% 0.104 316.5)
-
Step 950
950
#331B3C
oklch(27% 0.066 316.2)
#642C78 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) | #15417A | 0.124 |
| Deuteranopia (no green cones) | #2C4676 | 0.109 |
| Tritanopia (no blue cones) | #63394D | 0.087 |
| Achromatopsia (no color) | #454545 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642C78
#642C78
oklch(40.5% 0.133 316.2)
- #265700
#265700
oklch(40.6% 0.121 136.3)
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 #642C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.068
- Purple #800080 ΔE 0.071
- Rich Purple #720058 ΔE 0.077
- Grape Purple #5D1451 ΔE 0.077
- Blueberry #464196 ΔE 0.083
- Velvet #750851 ΔE 0.083
- Indigo #4B0082 ΔE 0.090
Use #642C78 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.