#51396D
Closest named color: Dark Slate Blue (#483D8B). oklch(39.6% 0.089 303.9), rgb(81, 57, 109).
Aa
White text reads best on this color (9.74:1).
About this color
#51396D is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.089 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 9.74:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #51396D |
| RGB | rgb(81, 57, 109) |
| HSL | hsl(268, 31%, 33%) |
| OKLCH | oklch(39.6% 0.089 303.9) |
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 #51396D | 9.74:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #51396D | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #51396D text on white | 9.74:1 | AAA | Lc 92.4 | Preferred for body text |
| #51396D text on black | 2.15:1 | Fails | Lc -10.0 | 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
#ECE7F5
oklch(93.6% 0.019 302.2)
-
Step 200
200
#DED4EE
oklch(88.6% 0.037 303.1)
-
Step 300
300
#CAB7E4
oklch(81% 0.066 304.2)
-
Step 400
400
#AF90D7
oklch(70.8% 0.106 303.8)
-
Step 500
500
#9B72CC
oklch(63% 0.137 303.7)
-
Step 600
600
#8759B9
oklch(55.6% 0.149 304.1)
-
Step 700
700
#72499F
oklch(49.2% 0.137 303.8)
-
Step 800
800
#5D3C81
oklch(42.7% 0.114 304.1)
-
Step 900
900 (this color)
#51396D
oklch(39.6% 0.089 303.9)
-
Step 950
950
#2C1F3D
oklch(27% 0.056 302.8)
#51396D 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) | #2B436F | 0.062 |
| Deuteranopia (no green cones) | #31446C | 0.057 |
| Tritanopia (no blue cones) | #4C424D | 0.068 |
| Achromatopsia (no color) | #444444 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51396D
#51396D
oklch(39.6% 0.089 303.9)
- #3D4E0E
#3D4E0E
oklch(39.6% 0.089 123.7)
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 #51396D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.071
- Twilight #4E518B ΔE 0.075
- Dusk #4E5481 ΔE 0.076
- Dark Grey Blue #29465B ΔE 0.081
- Rebecca Purple #663399 ΔE 0.084
- Dusty Grape #545775 ΔE 0.086
- Grape Purple #5D1451 ΔE 0.088
Use #51396D 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.