#511A8E
Closest named color: Indigo (#4B0082). oklch(37.6% 0.174 298.9), rgb(81, 26, 142).
Aa
White text reads best on this color (11.12:1).
About this color
#511A8E is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.174 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.038 away. White text reads best on it, at 11.12:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.88:1 |
| White text | 11.12:1 |
Values
| HEX | #511A8E |
| RGB | rgb(81, 26, 142) |
| HSL | hsl(268, 69%, 33%) |
| OKLCH | oklch(37.6% 0.174 298.9) |
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 #511A8E | 11.12:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #511A8E | 1.88:1 | Fails | Lc 9.3 | Not readable |
| #511A8E text on white | 11.12:1 | AAA | Lc 94.6 | Preferred for body text |
| #511A8E text on black | 1.88:1 | Fails | Lc -8.0 | 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
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EDE5FF
oklch(93.6% 0.036 299.7)
-
Step 200
200
#DED0FF
oklch(88.4% 0.066 298.7)
-
Step 300
300
#CAB1FF
oklch(81% 0.111 298.6)
-
Step 400
400
#B183FF
oklch(70.7% 0.179 298.9)
-
Step 500
500
#A05BFF
oklch(63.1% 0.232 298.9)
-
Step 600
600
#9117FF
oklch(55.6% 0.288 299)
-
Step 700
700
#7B00DC
oklch(49% 0.263 298.9)
-
Step 800
800
#640AB4
oklch(42.6% 0.223 298.8)
-
Step 900
900 (this color)
#511A8E
oklch(37.6% 0.174 298.9)
-
Step 950
950
#2F1353
oklch(27% 0.109 298.8)
#511A8E 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) | #003B91 | 0.112 |
| Deuteranopia (no green cones) | #003A8C | 0.112 |
| Tritanopia (no blue cones) | #423B54 | 0.131 |
| Achromatopsia (no color) | #3B3B3B | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #511A8E
#511A8E
oklch(37.6% 0.174 298.9)
- #3D4700
#3D4700
oklch(37.6% 0.088 118.5)
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 #511A8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.038
- Imperial Purple #480CA8 ΔE 0.050
- Chrysanthemum #560BAD ΔE 0.051
- Royal Purple #4B006E ΔE 0.066
- Rebecca Purple #663399 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.071
- Indigo Blue #3A18B1 ΔE 0.077
- Blueberry #464196 ΔE 0.080
Use #511A8E 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.