#51357D
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.118 298.9), rgb(81, 53, 125).
Aa
White text reads best on this color (9.74:1).
About this color
#51357D is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.118 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 9.74:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #51357D |
| RGB | rgb(81, 53, 125) |
| HSL | hsl(263, 40%, 35%) |
| OKLCH | oklch(39.9% 0.118 298.9) |
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 #51357D | 9.74:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #51357D | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #51357D text on white | 9.74:1 | AAA | Lc 92.3 | Preferred for body text |
| #51357D text on black | 2.15:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#ECE6F9
oklch(93.5% 0.026 300.3)
-
Step 200
200
#DDD3F6
oklch(88.6% 0.049 298.5)
-
Step 300
300
#C8B4F2
oklch(80.8% 0.089 299.2)
-
Step 400
400
#AD8BEC
oklch(70.7% 0.142 298.9)
-
Step 500
500
#9A6AE6
oklch(63% 0.182 299)
-
Step 600
600
#864ED4
oklch(55.6% 0.197 299.1)
-
Step 700
700
#713EB8
oklch(49.1% 0.183 298.6)
-
Step 800
800
#5C3495
oklch(42.7% 0.152 298.7)
-
Step 900
900 (this color)
#51357D
oklch(39.9% 0.118 298.9)
-
Step 950
950
#2C1C45
oklch(26.9% 0.075 299.4)
#51357D 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) | #16447F | 0.084 |
| Deuteranopia (no green cones) | #20437B | 0.077 |
| Tritanopia (no blue cones) | #484353 | 0.091 |
| Achromatopsia (no color) | #444444 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51357D
#51357D
oklch(39.9% 0.118 298.9)
- #424E00
#424E00
oklch(39.9% 0.094 119.3)
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 #51357D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.051
- Rebecca Purple #663399 ΔE 0.060
- Twilight #4E518B ΔE 0.074
- Cobalt #1E488F ΔE 0.083
- Dusk #4E5481 ΔE 0.084
- Indigo #4B0082 ΔE 0.086
- Twilight Blue #0A437A ΔE 0.091
Use #51357D 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.