#6B378F
Closest named color: Rebecca Purple (#663399). oklch(44.5% 0.144 308.9), rgb(107, 55, 143).
Aa
White text reads best on this color (8.17:1).
About this color
#6B378F is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.144 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.022 away. White text reads best on it, at 8.17:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #6B378F |
| RGB | rgb(107, 55, 143) |
| HSL | hsl(275, 44%, 39%) |
| OKLCH | oklch(44.5% 0.144 308.9) |
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 #6B378F | 8.17:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #6B378F | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #6B378F text on white | 8.17:1 | AAA | Lc 87.8 | Fine for body text |
| #6B378F text on black | 2.56:1 | Fails | Lc -14.3 | 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
#EFE6F7
oklch(93.7% 0.025 309.4)
-
Step 200
200
#E2D1F1
oklch(88.4% 0.047 309.2)
-
Step 300
300
#D0B2EA
oklch(80.8% 0.084 308.9)
-
Step 400
400
#B988E0
oklch(70.7% 0.134 308.9)
-
Step 500
500
#A867D7
oklch(63.1% 0.172 309.1)
-
Step 600
600
#934BC4
oklch(55.6% 0.186 309)
-
Step 700
700
#7D3BAA
oklch(49.1% 0.174 308.7)
-
Step 800
800 (this color)
#6B378F
oklch(44.5% 0.144 308.9)
-
Step 900
900
#532D6E
oklch(37.7% 0.112 309)
-
Step 950
950
#311B40
oklch(27% 0.071 309.9)
#6B378F 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) | #134D92 | 0.124 |
| Deuteranopia (no green cones) | #2B508D | 0.110 |
| Tritanopia (no blue cones) | #66485D | 0.102 |
| Achromatopsia (no color) | #4F4F4F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B378F
#6B378F
oklch(44.5% 0.144 308.9)
- #3F5F00
#3F5F00
oklch(44.4% 0.117 128.8)
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 #6B378F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.022
- Dark Slate Blue #483D8B ΔE 0.064
- Blueberry #464196 ΔE 0.068
- Light Eggplant #894585 ΔE 0.074
- Purple #800080 ΔE 0.079
- Twilight #4E518B ΔE 0.079
- Warm Purple #952E8F ΔE 0.083
- Dark Magenta #8B008B ΔE 0.084
Use #6B378F 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.