#511E66
Closest named color: Royal Purple (#4B006E). oklch(34.7% 0.126 314.4), rgb(81, 30, 102).
Aa
White text reads best on this color (12.15:1).
About this color
#511E66 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.126 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Royal Purple (#4B006E), ΔE 0.047 away. White text reads best on it, at 12.15:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Royal Purple (#4B006E) |
| Black text | 1.72:1 |
| White text | 12.15:1 |
Values
| HEX | #511E66 |
| RGB | rgb(81, 30, 102) |
| HSL | hsl(283, 55%, 26%) |
| OKLCH | oklch(34.7% 0.126 314.4) |
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 #511E66 | 12.15:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #511E66 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #511E66 text on white | 12.15:1 | AAA | Lc 97.1 | Preferred for body text |
| #511E66 text on black | 1.72:1 | Fails | Lc 0.0 | 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
#F9F3FC
oklch(97.1% 0.013 314.8)
-
Step 100
100
#F1E5F7
oklch(93.7% 0.027 314.7)
-
Step 200
200
#E6CFF2
oklch(88.4% 0.053 314.2)
-
Step 300
300
#D7AEEB
oklch(80.8% 0.095 314.5)
-
Step 400
400
#C381E1
oklch(70.6% 0.151 314.6)
-
Step 500
500
#B35DD9
oklch(63.1% 0.194 314.3)
-
Step 600
600
#9F3EC6
oklch(55.7% 0.21 314.5)
-
Step 700
700
#882EAB
oklch(49.1% 0.196 314.6)
-
Step 800
800
#6E288B
oklch(42.7% 0.163 314.2)
-
Step 900
900 (this color)
#511E66
oklch(34.7% 0.126 314.4)
-
Step 950
950
#341841
oklch(27% 0.079 313.9)
#511E66 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) | #003368 | 0.119 |
| Deuteranopia (no green cones) | #1B3764 | 0.105 |
| Tritanopia (no blue cones) | #4F2C3F | 0.083 |
| Achromatopsia (no color) | #363636 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #511E66
#511E66
oklch(34.7% 0.126 314.4)
- #214400
#214400
oklch(34.6% 0.1 134.4)
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 #511E66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Purple #4B006E ΔE 0.047
- Grape Purple #5D1451 ΔE 0.047
- Plum Purple #4E0550 ΔE 0.053
- Indigo #4B0082 ΔE 0.063
- Deep Violet #490648 ΔE 0.066
- Rich Purple #720058 ΔE 0.078
- Eggplant Purple #430541 ΔE 0.083
- Velvet #750851 ΔE 0.087
Use #511E66 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.