#6B378B
Closest named color: Rebecca Purple (#663399). oklch(44.2% 0.14 310.5), rgb(107, 55, 139).
Aa
White text reads best on this color (8.25:1).
About this color
#6B378B is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.140 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.028 away. White text reads best on it, at 8.25:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.140) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.54:1 |
| White text | 8.25:1 |
Values
| HEX | #6B378B |
| RGB | rgb(107, 55, 139) |
| HSL | hsl(277, 43%, 38%) |
| OKLCH | oklch(44.2% 0.14 310.5) |
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 #6B378B | 8.25:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #6B378B | 2.54:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #6B378B text on white | 8.25:1 | AAA | Lc 88.1 | Fine for body text |
| #6B378B text on black | 2.54:1 | Fails | Lc -14.1 | 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
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#EFE6F6
oklch(93.7% 0.023 310.7)
-
Step 200
200
#E3D1F0
oklch(88.5% 0.046 311.2)
-
Step 300
300
#D1B2E8
oklch(80.8% 0.082 310.5)
-
Step 400
400
#BA88DD
oklch(70.7% 0.131 310.4)
-
Step 500
500
#A968D3
oklch(63.2% 0.166 310.5)
-
Step 600
600
#944CC0
oklch(55.6% 0.181 310.4)
-
Step 700
700
#7E3CA6
oklch(49.1% 0.169 310.3)
-
Step 800
800 (this color)
#6B378B
oklch(44.2% 0.14 310.5)
-
Step 900
900
#532D6C
oklch(37.6% 0.11 310)
-
Step 950
950
#311B3F
oklch(27% 0.069 310.8)
#6B378B 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) | #194C8E | 0.121 |
| Deuteranopia (no green cones) | #2F4F89 | 0.107 |
| Tritanopia (no blue cones) | #67475B | 0.098 |
| Achromatopsia (no color) | #4F4F4F | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B378B
#6B378B
oklch(44.2% 0.14 310.5)
- #3B5F00
#3B5F00
oklch(44.1% 0.12 130.5)
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 #6B378B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.028
- Dark Slate Blue #483D8B ΔE 0.064
- Blueberry #464196 ΔE 0.070
- Light Eggplant #894585 ΔE 0.073
- Purple #800080 ΔE 0.077
- Twilight #4E518B ΔE 0.078
- Warm Purple #952E8F ΔE 0.083
- Dark Magenta #8B008B ΔE 0.084
Use #6B378B 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.