#51308E
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.148 295.1), rgb(81, 48, 142).
Aa
White text reads best on this color (9.70:1).
About this color
#51308E is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.148 and its hue 295°. 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 9.70:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #51308E |
| RGB | rgb(81, 48, 142) |
| HSL | hsl(261, 49%, 37%) |
| OKLCH | oklch(40.3% 0.148 295.1) |
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 #51308E | 9.70:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #51308E | 2.16:1 | Fails | Lc 11.9 | Not readable |
| #51308E text on white | 9.70:1 | AAA | Lc 92.0 | Preferred for body text |
| #51308E text on black | 2.16:1 | Fails | Lc -10.4 | 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 800.
-
Step 50
50
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DBD3F6
oklch(88.4% 0.048 295.9)
-
Step 300
300
#C4B6F3
oklch(80.9% 0.086 294.9)
-
Step 400
400
#A78EED
oklch(70.7% 0.137 294.7)
-
Step 500
500
#936EE7
oklch(63.1% 0.176 294.9)
-
Step 600
600
#7F52D5
oklch(55.6% 0.192 295.2)
-
Step 700
700
#6B42B9
oklch(49.1% 0.178 294.8)
-
Step 800
800 (this color)
#51308E
oklch(40.3% 0.148 295.1)
-
Step 900
900
#473177
oklch(37.7% 0.115 294.8)
-
Step 950
950
#2A1D46
oklch(27% 0.074 295.6)
#51308E 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) | #004591 | 0.095 |
| Deuteranopia (no green cones) | #00438C | 0.096 |
| Tritanopia (no blue cones) | #41465A | 0.117 |
| Achromatopsia (no color) | #444444 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51308E
#51308E
oklch(40.3% 0.148 295.1)
- #474E00
#474E00
oklch(40.4% 0.092 115.5)
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 #51308E, 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 0.043
- Rebecca Purple #663399 ΔE 0.045
- Chrysanthemum #560BAD ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.068
- Indigo #4B0082 ΔE 0.074
- Indigo Blue #3A18B1 ΔE 0.084
- Twilight #4E518B ΔE 0.084
Use #51308E 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.