#6B337B
Closest named color: Rebecca Purple (#663399). oklch(42.6% 0.128 318.2), rgb(107, 51, 123).
Aa
White text reads best on this color (8.80:1).
About this color
#6B337B is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.128 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 0.051 away. White text reads best on it, at 8.80:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #6B337B |
| RGB | rgb(107, 51, 123) |
| HSL | hsl(287, 41%, 34%) |
| OKLCH | oklch(42.6% 0.128 318.2) |
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 #6B337B | 8.80:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #6B337B | 2.38:1 | Fails | Lc 14.3 | Not readable |
| #6B337B text on white | 8.80:1 | AAA | Lc 89.7 | Fine for body text |
| #6B337B text on black | 2.38:1 | Fails | Lc -12.6 | 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
#D5B2E0
oklch(80.9% 0.074 318)
-
Step 400
400
#C088D1
oklch(70.8% 0.12 318.1)
-
Step 500
500
#AF68C4
oklch(63.1% 0.152 318.2)
-
Step 600
600
#9B4DB1
oklch(55.7% 0.167 318.3)
-
Step 700
700
#843D98
oklch(49.1% 0.155 318.3)
-
Step 800
800 (this color)
#6B337B
oklch(42.6% 0.128 318.2)
-
Step 900
900
#572E63
oklch(37.7% 0.099 318.2)
-
Step 950
950
#331B3A
oklch(26.9% 0.064 318.3)
#6B337B 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) | #23477D | 0.119 |
| Deuteranopia (no green cones) | #364C79 | 0.105 |
| Tritanopia (no blue cones) | #6B3E52 | 0.081 |
| Achromatopsia (no color) | #4A4A4A | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B337B
#6B337B
oklch(42.6% 0.128 318.2)
- #245E06
#245E06
oklch(42.6% 0.128 138.3)
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 #6B337B, 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 0.071
- Purple #800080 ΔE 0.071
- Light Eggplant #894585 ΔE 0.077
- Blueberry #464196 ΔE 0.083
- Dark Magenta #8B008B ΔE 0.085
- Rich Purple #720058 ΔE 0.086
- Twilight #4E518B ΔE 0.087
Use #6B337B 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.