#51317D
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.125 300.1), rgb(81, 49, 125).
Aa
White text reads best on this color (10.07:1).
About this color
#51317D is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.125 and its hue 300°. 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 10.07:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #51317D |
| RGB | rgb(81, 49, 125) |
| HSL | hsl(265, 44%, 34%) |
| OKLCH | oklch(39.2% 0.125 300.1) |
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 #51317D | 10.07:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #51317D | 2.08:1 | Fails | Lc 10.9 | Not readable |
| #51317D text on white | 10.07:1 | AAA | Lc 93.0 | Preferred for body text |
| #51317D text on black | 2.08:1 | Fails | Lc -9.4 | 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
#DED2F7
oklch(88.5% 0.052 300.1)
-
Step 300
300
#CAB3F4
oklch(80.9% 0.093 300.5)
-
Step 400
400
#B089EF
oklch(70.8% 0.149 300.3)
-
Step 500
500
#9D67E9
oklch(63.1% 0.19 300.2)
-
Step 600
600
#894AD8
oklch(55.7% 0.207 300.1)
-
Step 700
700
#7439BB
oklch(49% 0.193 300)
-
Step 800
800
#5E3197
oklch(42.7% 0.159 299.9)
-
Step 900
900 (this color)
#51317D
oklch(39.2% 0.125 300.1)
-
Step 950
950
#2D1B47
oklch(27% 0.08 300)
#51317D 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) | #09427F | 0.094 |
| Deuteranopia (no green cones) | #19417B | 0.086 |
| Tritanopia (no blue cones) | #484152 | 0.095 |
| Achromatopsia (no color) | #424242 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51317D
#51317D
oklch(39.2% 0.125 300.1)
- #3F4C00
#3F4C00
oklch(39.1% 0.093 120.2)
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 #51317D, 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 0.056
- Rebecca Purple #663399 ΔE 0.061
- Indigo #4B0082 ΔE 0.076
- Twilight #4E518B ΔE 0.084
- Royal Purple #4B006E ΔE 0.085
- Cobalt #1E488F ΔE 0.088
- Grape Purple #5D1451 ΔE 0.092
Use #51317D 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.