#591E78
Closest named color: Indigo (#4B0082). oklch(37.2% 0.148 311.2), rgb(89, 30, 120).
Aa
White text reads best on this color (11.16:1).
About this color
#591E78 is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.148 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.053 away. White text reads best on it, at 11.16:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #591E78 |
| RGB | rgb(89, 30, 120) |
| HSL | hsl(279, 60%, 29%) |
| OKLCH | oklch(37.2% 0.148 311.2) |
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 #591E78 | 11.16:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #591E78 | 1.88:1 | Fails | Lc 8.9 | Not readable |
| #591E78 text on white | 11.16:1 | AAA | Lc 95.0 | Preferred for body text |
| #591E78 text on black | 1.88:1 | Fails | Lc -7.6 | 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
#F9F3FD
oklch(97.2% 0.015 312.2)
-
Step 100
100
#F1E4FA
oklch(93.6% 0.032 311.7)
-
Step 200
200
#E6CEF8
oklch(88.4% 0.062 310.7)
-
Step 300
300
#D8ACF6
oklch(80.9% 0.112 311.1)
-
Step 400
400
#C47CF1
oklch(70.8% 0.178 311)
-
Step 500
500
#B552EB
oklch(63% 0.228 311.3)
-
Step 600
600
#A12BDA
oklch(55.6% 0.248 311.2)
-
Step 700
700
#8A1ABD
oklch(49.2% 0.23 311.3)
-
Step 800
800
#701B99
oklch(42.8% 0.191 311.2)
-
Step 900
900 (this color)
#591E78
oklch(37.2% 0.148 311.2)
-
Step 950
950
#351447
oklch(26.9% 0.095 311.5)
#591E78 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) | #00397B | 0.128 |
| Deuteranopia (no green cones) | #103C76 | 0.123 |
| Tritanopia (no blue cones) | #553249 | 0.100 |
| Achromatopsia (no color) | #3B3B3B | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #591E78
#591E78
oklch(37.2% 0.148 311.2)
- #2C4A00
#2C4A00
oklch(37.1% 0.101 131)
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 #591E78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.053
- Royal Purple #4B006E ΔE 0.055
- Grape Purple #5D1451 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.077
- Plum Purple #4E0550 ΔE 0.081
- Rich Purple #720058 ΔE 0.081
- Purple #800080 ΔE 0.084
Use #591E78 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.