#51376B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.1% 0.09 305.7), rgb(81, 55, 107).
Aa
White text reads best on this color (9.95:1).
About this color
#51376B is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.090 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 9.95:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.95:1 |
Values
| HEX | #51376B |
| RGB | rgb(81, 55, 107) |
| HSL | hsl(270, 32%, 32%) |
| OKLCH | oklch(39.1% 0.09 305.7) |
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 #51376B | 9.95:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #51376B | 2.10:1 | Fails | Lc 11.0 | Not readable |
| #51376B text on white | 9.95:1 | AAA | Lc 93.0 | Preferred for body text |
| #51376B text on black | 2.10:1 | Fails | Lc -9.5 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F5
oklch(93.7% 0.02 305.3)
-
Step 200
200
#DFD3ED
oklch(88.4% 0.037 306.4)
-
Step 300
300
#CBB6E4
oklch(80.9% 0.068 305.6)
-
Step 400
400
#B18FD6
oklch(70.7% 0.107 305.8)
-
Step 500
500
#9E71CB
oklch(63.1% 0.138 305.9)
-
Step 600
600
#8958B8
oklch(55.6% 0.15 305.7)
-
Step 700
700
#74479E
oklch(49% 0.139 305.8)
-
Step 800
800
#5F3B80
oklch(42.7% 0.115 306.2)
-
Step 900
900 (this color)
#51376B
oklch(39.1% 0.09 305.7)
-
Step 950
950
#2D1E3C
oklch(26.9% 0.057 306)
#51376B 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) | #29426D | 0.066 |
| Deuteranopia (no green cones) | #30436A | 0.060 |
| Tritanopia (no blue cones) | #4D404C | 0.066 |
| Achromatopsia (no color) | #434343 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51376B
#51376B
oklch(39.1% 0.09 305.7)
- #394D0E
#394D0E
oklch(39% 0.089 126)
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 #51376B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Blueberry #464196 ΔE 0.075
- Twilight #4E518B ΔE 0.080
- Dusk #4E5481 ΔE 0.082
- Dark Grey Blue #29465B ΔE 0.082
- Grape Purple #5D1451 ΔE 0.083
- Rebecca Purple #663399 ΔE 0.086
- Purple Brown #673A3F ΔE 0.089
Use #51376B 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.