#51317F
Closest named color: Dark Slate Blue (#483D8B). oklch(39.3% 0.127 299.4), rgb(81, 49, 127).
Aa
White text reads best on this color (10.02:1).
About this color
#51317F is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.127 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 0.036 away. White text reads best on it, at 10.02:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.02:1 |
Values
| HEX | #51317F |
| RGB | rgb(81, 49, 127) |
| HSL | hsl(265, 44%, 35%) |
| OKLCH | oklch(39.3% 0.127 299.4) |
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 #51317F | 10.02:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #51317F | 2.09:1 | Fails | Lc 11.0 | Not readable |
| #51317F text on white | 10.02:1 | AAA | Lc 92.9 | Preferred for body text |
| #51317F text on black | 2.09:1 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#ECE6FA
oklch(93.6% 0.027 299.5)
-
Step 200
200
#DED2F8
oklch(88.5% 0.053 299.7)
-
Step 300
300
#C9B3F6
oklch(80.9% 0.096 299.3)
-
Step 400
400
#AF88F1
oklch(70.6% 0.153 299.6)
-
Step 500
500
#9C66EC
oklch(63% 0.195 299.3)
-
Step 600
600
#8848DA
oklch(55.5% 0.212 299.5)
-
Step 700
700
#7438BD
oklch(49.1% 0.197 299.7)
-
Step 800
800
#5E3099
oklch(42.7% 0.163 299.5)
-
Step 900
900 (this color)
#51317F
oklch(39.3% 0.127 299.4)
-
Step 950
950
#2D1B47
oklch(27% 0.08 300)
#51317F 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) | #054282 | 0.095 |
| Deuteranopia (no green cones) | #16427D | 0.088 |
| Tritanopia (no blue cones) | #474153 | 0.096 |
| Achromatopsia (no color) | #424242 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51317F
#51317F
oklch(39.3% 0.127 299.4)
- #404C00
#404C00
oklch(39.2% 0.093 119.5)
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 #51317F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.036
- Blueberry #464196 ΔE 0.054
- Rebecca Purple #663399 ΔE 0.058
- Indigo #4B0082 ΔE 0.076
- Twilight #4E518B ΔE 0.083
- Royal Purple #4B006E ΔE 0.086
- Cobalt #1E488F ΔE 0.088
- Imperial Purple #480CA8 ΔE 0.089
Use #51317F 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.