#51336C
Closest named color: Dark Slate Blue (#483D8B). oklch(38.4% 0.098 306.6), rgb(81, 51, 108).
Aa
White text reads best on this color (10.29:1).
About this color
#51336C is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.098 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 10.29:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #51336C |
| RGB | rgb(81, 51, 108) |
| HSL | hsl(272, 36%, 31%) |
| OKLCH | oklch(38.4% 0.098 306.6) |
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 #51336C | 10.29:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #51336C | 2.03:1 | Fails | Lc 10.2 | Not readable |
| #51336C text on white | 10.29:1 | AAA | Lc 93.7 | Preferred for body text |
| #51336C text on black | 2.03:1 | Fails | Lc -8.8 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F5
oklch(93.5% 0.021 306.8)
-
Step 200
200
#E0D3EF
oklch(88.6% 0.04 306.5)
-
Step 300
300
#CDB5E7
oklch(81% 0.074 306.6)
-
Step 400
400
#B48CDA
oklch(70.7% 0.119 307.1)
-
Step 500
500
#A16ED0
oklch(63.1% 0.15 306.6)
-
Step 600
600
#8C53BD
oklch(55.5% 0.165 306.6)
-
Step 700
700
#7743A3
oklch(49% 0.153 306.6)
-
Step 800
800
#613884
oklch(42.7% 0.126 306.7)
-
Step 900
900 (this color)
#51336C
oklch(38.4% 0.098 306.6)
-
Step 950
950
#2E1D3E
oklch(26.9% 0.063 306.4)
#51336C 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) | #233F6E | 0.075 |
| Deuteranopia (no green cones) | #2B416B | 0.069 |
| Tritanopia (no blue cones) | #4D3D4A | 0.072 |
| Achromatopsia (no color) | #404040 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51336C
#51336C
oklch(38.4% 0.098 306.6)
- #354C00
#354C00
oklch(38.3% 0.099 126.8)
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 #51336C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Grape Purple #5D1451 ΔE 0.076
- Blueberry #464196 ΔE 0.076
- Rebecca Purple #663399 ΔE 0.084
- Twilight #4E518B ΔE 0.088
- Dark Grey Blue #29465B ΔE 0.090
- Royal Purple #4B006E ΔE 0.091
- Dusk #4E5481 ΔE 0.091
Use #51336C 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.