#591D81
Closest named color: Indigo (#4B0082). oklch(37.8% 0.159 307.7), rgb(89, 29, 129).
Aa
White text reads best on this color (10.95:1).
About this color
#591D81 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.159 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.047 away. White text reads best on it, at 10.95:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.159) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #591D81 |
| RGB | rgb(89, 29, 129) |
| HSL | hsl(276, 63%, 31%) |
| OKLCH | oklch(37.8% 0.159 307.7) |
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 #591D81 | 10.95:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #591D81 | 1.91:1 | Fails | Lc 9.5 | Not readable |
| #591D81 text on white | 10.95:1 | AAA | Lc 94.4 | Preferred for body text |
| #591D81 text on black | 1.91:1 | Fails | Lc -8.1 | 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
#F8F3FE
oklch(97.1% 0.015 306.4)
-
Step 100
100
#F0E4FC
oklch(93.5% 0.034 308.1)
-
Step 200
200
#E5CEFC
oklch(88.5% 0.067 307.6)
-
Step 300
300
#D6ACFC
oklch(81% 0.118 307.9)
-
Step 400
400
#C17AFB
oklch(70.7% 0.191 307.6)
-
Step 500
500
#B24EF8
oklch(63.1% 0.244 307.7)
-
Step 600
600
#9E21E7
oklch(55.6% 0.266 307.7)
-
Step 700
700
#870AC9
oklch(49.1% 0.247 307.5)
-
Step 800
800
#6E14A2
oklch(42.8% 0.204 307.8)
-
Step 900
900 (this color)
#591D81
oklch(37.8% 0.159 307.7)
-
Step 950
950
#34134B
oklch(27% 0.101 308.1)
#591D81 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) | #003A84 | 0.126 |
| Deuteranopia (no green cones) | #003D7F | 0.128 |
| Tritanopia (no blue cones) | #52354E | 0.110 |
| Achromatopsia (no color) | #3C3C3C | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #591D81
#591D81
oklch(37.8% 0.159 307.7)
- #334B00
#334B00
oklch(37.9% 0.098 127.6)
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 #591D81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.047
- Royal Purple #4B006E ΔE 0.059
- Rebecca Purple #663399 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.073
- Chrysanthemum #560BAD ΔE 0.075
- Imperial Purple #480CA8 ΔE 0.079
- Purple #800080 ΔE 0.084
- Grape Purple #5D1451 ΔE 0.084
Use #591D81 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.