#642F9F
Closest named color: Rebecca Purple (#663399). oklch(43.7% 0.172 301.2), rgb(100, 47, 159).
Aa
White text reads best on this color (8.57:1).
About this color
#642F9F is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.172 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.014 away. White text reads best on it, at 8.57:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.44:1 |
| White text | 8.57:1 |
Values
| HEX | #642F9F |
| RGB | rgb(100, 47, 159) |
| HSL | hsl(268, 54%, 40%) |
| OKLCH | oklch(43.7% 0.172 301.2) |
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 #642F9F | 8.57:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #642F9F | 2.44:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #642F9F text on white | 8.57:1 | AAA | Lc 88.8 | Fine for body text |
| #642F9F text on black | 2.44:1 | Fails | Lc -13.4 | 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
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#EDE6FB
oklch(93.7% 0.029 301)
-
Step 200
200
#DFD1F9
oklch(88.5% 0.056 301.2)
-
Step 300
300
#CCB2F8
oklch(81% 0.101 301.2)
-
Step 400
400
#B286F4
oklch(70.7% 0.161 300.8)
-
Step 500
500
#A162EF
oklch(63.1% 0.205 301.3)
-
Step 600
600
#8D42DE
oklch(55.6% 0.224 301.3)
-
Step 700
700
#7832C0
oklch(49.1% 0.208 301.4)
-
Step 800
800 (this color)
#642F9F
oklch(43.7% 0.172 301.2)
-
Step 900
900
#4F2A7C
oklch(37.8% 0.134 300.9)
-
Step 950
950
#2E1948
oklch(26.9% 0.085 301.5)
#642F9F 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) | #004CA2 | 0.124 |
| Deuteranopia (no green cones) | #004B9D | 0.124 |
| Tritanopia (no blue cones) | #574A63 | 0.129 |
| Achromatopsia (no color) | #4C4C4C | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642F9F
#642F9F
oklch(43.7% 0.172 301.2)
- #495A00
#495A00
oklch(43.7% 0.105 121.5)
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 #642F9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.014
- Grape #7209B7 ΔE 0.058
- Chrysanthemum #560BAD ΔE 0.060
- Blueberry #464196 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.065
- Bluey Purple #6241C7 ΔE 0.073
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Imperial Purple #480CA8 ΔE 0.079
Use #642F9F 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.