#642C7B
Closest named color: Rebecca Purple (#663399). oklch(40.7% 0.136 314.8), rgb(100, 44, 123).
Aa
White text reads best on this color (9.59:1).
About this color
#642C7B is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.136 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.051 away. White text reads best on it, at 9.59:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.18:1 |
| White text | 9.59:1 |
Values
| HEX | #642C7B |
| RGB | rgb(100, 44, 123) |
| HSL | hsl(283, 47%, 33%) |
| OKLCH | oklch(40.7% 0.136 314.8) |
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 #642C7B | 9.59:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #642C7B | 2.18:1 | Fails | Lc 12.3 | Not readable |
| #642C7B text on white | 9.59:1 | AAA | Lc 91.7 | Preferred for body text |
| #642C7B text on black | 2.18:1 | Fails | Lc -10.7 | 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
#F0E6F5
oklch(93.7% 0.023 314.7)
-
Step 200
200
#E4D1EE
oklch(88.5% 0.044 314.1)
-
Step 300
300
#D4B2E5
oklch(81% 0.079 314.3)
-
Step 400
400
#BE87D7
oklch(70.6% 0.128 314.8)
-
Step 500
500
#AD67CC
oklch(63.1% 0.162 314.6)
-
Step 600
600
#994BB9
oklch(55.6% 0.177 314.9)
-
Step 700
700
#823B9F
oklch(49% 0.164 314.8)
-
Step 800
800 (this color)
#642C7B
oklch(40.7% 0.136 314.8)
-
Step 900
900
#562D68
oklch(37.7% 0.106 314.5)
-
Step 950
950
#321B3D
oklch(27% 0.067 313.9)
#642C7B 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) | #10427D | 0.127 |
| Deuteranopia (no green cones) | #2A4679 | 0.110 |
| Tritanopia (no blue cones) | #623A4F | 0.089 |
| Achromatopsia (no color) | #454545 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642C7B
#642C7B
oklch(40.7% 0.136 314.8)
- #2B5600
#2B5600
oklch(40.6% 0.117 134.5)
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 #642C7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.066
- Purple #800080 ΔE 0.070
- Blueberry #464196 ΔE 0.080
- Rich Purple #720058 ΔE 0.080
- Grape Purple #5D1451 ΔE 0.081
- Velvet #750851 ΔE 0.087
- Indigo #4B0082 ΔE 0.088
Use #642C7B 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.