#642A74
Closest named color: Rebecca Purple (#663399). oklch(40% 0.132 318.4), rgb(100, 42, 116).
Aa
White text reads best on this color (9.88:1).
About this color
#642A74 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.132 and its hue 318°. 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 9.88:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.12:1 |
| White text | 9.88:1 |
Values
| HEX | #642A74 |
| RGB | rgb(100, 42, 116) |
| HSL | hsl(287, 47%, 31%) |
| OKLCH | oklch(40% 0.132 318.4) |
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 #642A74 | 9.88:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #642A74 | 2.12:1 | Fails | Lc 11.6 | Not readable |
| #642A74 text on white | 9.88:1 | AAA | Lc 92.4 | Preferred for body text |
| #642A74 text on black | 2.12:1 | Fails | Lc -10.0 | 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
#E9CEF1
oklch(88.5% 0.055 318.4)
-
Step 300
300
#DCADEA
oklch(81% 0.098 318.3)
-
Step 400
400
#C97EDF
oklch(70.7% 0.157 318.3)
-
Step 500
500
#BB58D6
oklch(63.2% 0.201 318.5)
-
Step 600
600
#A636C3
oklch(55.6% 0.219 318.5)
-
Step 700
700
#8E26A8
oklch(49% 0.204 318.5)
-
Step 800
800
#732388
oklch(42.6% 0.168 318.3)
-
Step 900
900 (this color)
#642A74
oklch(40% 0.132 318.4)
-
Step 950
950
#371640
oklch(27% 0.084 318.6)
#642A74 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) | #163F76 | 0.126 |
| Deuteranopia (no green cones) | #2E4572 | 0.109 |
| Tritanopia (no blue cones) | #64364B | 0.082 |
| Achromatopsia (no color) | #434343 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642A74
#642A74
oklch(40% 0.132 318.4)
- #1E5600
#1E5600
oklch(40% 0.124 138.3)
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 #642A74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.063
- Grape Purple #5D1451 ΔE 0.070
- Rich Purple #720058 ΔE 0.070
- Purple #800080 ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.073
- Velvet #750851 ΔE 0.076
- Royal Purple #4B006E ΔE 0.089
- Blueberry #464196 ΔE 0.089
Use #642A74 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.