#512B91
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.158 295.3), rgb(81, 43, 145).
Aa
White text reads best on this color (9.97:1).
About this color
#512B91 is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.158 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 0.043 away. White text reads best on it, at 9.97:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #512B91 |
| RGB | rgb(81, 43, 145) |
| HSL | hsl(262, 54%, 37%) |
| OKLCH | oklch(39.9% 0.158 295.3) |
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 #512B91 | 9.97:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #512B91 | 2.10:1 | Fails | Lc 11.4 | Not readable |
| #512B91 text on white | 9.97:1 | AAA | Lc 92.5 | Preferred for body text |
| #512B91 text on black | 2.10:1 | Fails | Lc -9.9 | 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
#F6F4FF
oklch(97.2% 0.015 294.5)
-
Step 100
100
#EBE6FF
oklch(93.6% 0.034 294.9)
-
Step 200
200
#DCD2FF
oklch(88.6% 0.062 295.3)
-
Step 300
300
#C6B3FF
oklch(81% 0.107 295.4)
-
Step 400
400
#AA87FF
oklch(70.7% 0.172 295.1)
-
Step 500
500
#9861FF
oklch(63.2% 0.224 295.3)
-
Step 600
600
#8734F8
oklch(55.7% 0.264 295.5)
-
Step 700
700
#7322D8
oklch(49.2% 0.245 295.5)
-
Step 800
800
#5D21AF
oklch(42.8% 0.203 295.3)
-
Step 900
900 (this color)
#512B91
oklch(39.9% 0.158 295.3)
-
Step 950
950
#2C1751
oklch(27% 0.101 295.5)
#512B91 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) | #004394 | 0.099 |
| Deuteranopia (no green cones) | #00418F | 0.099 |
| Tritanopia (no blue cones) | #40445A | 0.123 |
| Achromatopsia (no color) | #424242 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #512B91
#512B91
oklch(39.9% 0.158 295.3)
- #464D00
#464D00
oklch(40% 0.091 115.6)
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 #512B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Rebecca Purple #663399 ΔE 0.047
- Blueberry #464196 ΔE 0.051
- Chrysanthemum #560BAD ΔE 0.057
- Imperial Purple #480CA8 ΔE 0.058
- Indigo #4B0082 ΔE 0.066
- Indigo Blue #3A18B1 ΔE 0.076
- Sapphire #2138AB ΔE 0.086
Use #512B91 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.