#591B83
Closest named color: Indigo (#4B0082). oklch(37.8% 0.163 307.1), rgb(89, 27, 131).
Aa
White text reads best on this color (10.99:1).
About this color
#591B83 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.163 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.045 away. White text reads best on it, at 10.99:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.90:1 |
| White text | 10.99:1 |
Values
| HEX | #591B83 |
| RGB | rgb(89, 27, 131) |
| HSL | hsl(276, 66%, 31%) |
| OKLCH | oklch(37.8% 0.163 307.1) |
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 #591B83 | 10.99:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #591B83 | 1.90:1 | Fails | Lc 9.4 | Not readable |
| #591B83 text on white | 10.99:1 | AAA | Lc 94.5 | Preferred for body text |
| #591B83 text on black | 1.90:1 | 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
#F0E4FD
oklch(93.6% 0.036 307.2)
-
Step 200
200
#E5CEFD
oklch(88.5% 0.068 307.2)
-
Step 300
300
#D5ABFE
oklch(80.8% 0.122 307)
-
Step 400
400
#C179FE
oklch(70.7% 0.196 307.1)
-
Step 500
500
#B24CFC
oklch(63.2% 0.251 307.1)
-
Step 600
600
#9E1BEB
oklch(55.6% 0.272 307)
-
Step 700
700
#8700CC
oklch(49.1% 0.252 307)
-
Step 800
800
#6E0EA5
oklch(42.7% 0.21 307.2)
-
Step 900
900 (this color)
#591B83
oklch(37.8% 0.163 307.1)
-
Step 950
950
#34124D
oklch(27% 0.105 307.1)
#591B83 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) | #003A86 | 0.127 |
| Deuteranopia (no green cones) | #003D81 | 0.129 |
| Tritanopia (no blue cones) | #52354E | 0.114 |
| Achromatopsia (no color) | #3C3C3C | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #591B83
#591B83
oklch(37.8% 0.163 307.1)
- #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 #591B83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.045
- Royal Purple #4B006E ΔE 0.059
- Rebecca Purple #663399 ΔE 0.064
- Chrysanthemum #560BAD ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.075
- Imperial Purple #480CA8 ΔE 0.076
- Purple #800080 ΔE 0.084
- Blueberry #464196 ΔE 0.087
Use #591B83 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.