#51337A
Closest named color: Dark Slate Blue (#483D8B). oklch(39.3% 0.117 300.6), rgb(81, 51, 122).
Aa
White text reads best on this color (9.97:1).
About this color
#51337A is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.117 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 9.97:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #51337A |
| RGB | rgb(81, 51, 122) |
| HSL | hsl(265, 41%, 34%) |
| OKLCH | oklch(39.3% 0.117 300.6) |
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 #51337A | 9.97:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #51337A | 2.10:1 | Fails | Lc 11.1 | Not readable |
| #51337A text on white | 9.97:1 | AAA | Lc 92.9 | Preferred for body text |
| #51337A text on black | 2.10:1 | Fails | Lc -9.6 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE6F9
oklch(93.5% 0.026 300.3)
-
Step 200
200
#DED2F5
oklch(88.4% 0.049 301)
-
Step 300
300
#CAB4F1
oklch(80.9% 0.088 301)
-
Step 400
400
#AF8AEA
oklch(70.6% 0.141 300.6)
-
Step 500
500
#9D6AE4
oklch(63.2% 0.18 300.7)
-
Step 600
600
#884DD1
oklch(55.5% 0.195 300.7)
-
Step 700
700
#743DB5
oklch(49.1% 0.182 300.9)
-
Step 800
800
#5E3493
oklch(42.8% 0.15 300.5)
-
Step 900
900 (this color)
#51337A
oklch(39.3% 0.117 300.6)
-
Step 950
950
#2D1C45
oklch(27.1% 0.075 300.6)
#51337A 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) | #15427C | 0.086 |
| Deuteranopia (no green cones) | #204278 | 0.079 |
| Tritanopia (no blue cones) | #494151 | 0.089 |
| Achromatopsia (no color) | #424242 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51337A
#51337A
oklch(39.3% 0.117 300.6)
- #3F4D00
#3F4D00
oklch(39.4% 0.094 120.9)
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 #51337A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Blueberry #464196 ΔE 0.057
- Rebecca Purple #663399 ΔE 0.064
- Twilight #4E518B ΔE 0.080
- Indigo #4B0082 ΔE 0.082
- Cobalt #1E488F ΔE 0.087
- Dusk #4E5481 ΔE 0.089
- Royal Purple #4B006E ΔE 0.089
Use #51337A 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.