#51337F
Closest named color: Dark Slate Blue (#483D8B). oklch(39.7% 0.124 298.8), rgb(81, 51, 127).
Aa
White text reads best on this color (9.85:1).
About this color
#51337F is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.124 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 0.033 away. White text reads best on it, at 9.85:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.124) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.12:1 |
| White text | 9.85:1 |
Values
| HEX | #51337F |
| RGB | rgb(81, 51, 127) |
| HSL | hsl(264, 43%, 35%) |
| OKLCH | oklch(39.7% 0.124 298.8) |
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 #51337F | 9.85:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #51337F | 2.12:1 | Fails | Lc 11.4 | Not readable |
| #51337F text on white | 9.85:1 | AAA | Lc 92.6 | Preferred for body text |
| #51337F text on black | 2.12:1 | Fails | Lc -9.9 | 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
#ECE6FA
oklch(93.6% 0.027 299.5)
-
Step 200
200
#DDD2F7
oklch(88.4% 0.052 298.9)
-
Step 300
300
#C8B4F5
oklch(80.9% 0.093 298.4)
-
Step 400
400
#AE8AF0
oklch(70.8% 0.148 298.8)
-
Step 500
500
#9B68EA
oklch(63.1% 0.19 299)
-
Step 600
600
#874BD9
oklch(55.7% 0.207 298.9)
-
Step 700
700
#723BBC
oklch(49.1% 0.192 298.6)
-
Step 800
800
#5D3298
oklch(42.8% 0.159 298.8)
-
Step 900
900 (this color)
#51337F
oklch(39.7% 0.124 298.8)
-
Step 950
950
#2C1B47
oklch(26.9% 0.08 298.8)
#51337F 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) | #0D4381 | 0.090 |
| Deuteranopia (no green cones) | #1A437D | 0.083 |
| Tritanopia (no blue cones) | #474354 | 0.095 |
| Achromatopsia (no color) | #434343 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51337F
#51337F
oklch(39.7% 0.124 298.8)
- #424D00
#424D00
oklch(39.6% 0.093 118.7)
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 #51337F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.051
- Rebecca Purple #663399 ΔE 0.058
- Twilight #4E518B ΔE 0.078
- Indigo #4B0082 ΔE 0.080
- Cobalt #1E488F ΔE 0.085
- Dusk #4E5481 ΔE 0.089
- Royal Purple #4B006E ΔE 0.090
Use #51337F 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.