#581F77
Closest named color: Indigo (#4B0082). oklch(37.1% 0.146 310.9), rgb(88, 31, 119).
Aa
White text reads best on this color (11.18:1).
About this color
#581F77 is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.146 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 11.18:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.87:1 |
| White text | 11.18:1 |
Values
| HEX | #581F77 |
| RGB | rgb(88, 31, 119) |
| HSL | hsl(279, 59%, 29%) |
| OKLCH | oklch(37.1% 0.146 310.9) |
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 #581F77 | 11.18:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #581F77 | 1.87:1 | Fails | Lc 8.8 | Not readable |
| #581F77 text on white | 11.18:1 | AAA | Lc 95.1 | Preferred for body text |
| #581F77 text on black | 1.87:1 | 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
#E6CEF7
oklch(88.4% 0.061 311.3)
-
Step 300
300
#D7ADF5
oklch(81% 0.109 310.6)
-
Step 400
400
#C37DF0
oklch(70.8% 0.175 310.7)
-
Step 500
500
#B454EA
oklch(63.1% 0.224 311.1)
-
Step 600
600
#9F2FD8
oklch(55.5% 0.243 310.8)
-
Step 700
700
#881EBC
oklch(49.1% 0.226 310.6)
-
Step 800
800
#6F1D98
oklch(42.7% 0.188 310.9)
-
Step 900
900 (this color)
#581F77
oklch(37.1% 0.146 310.9)
-
Step 950
950
#351547
oklch(27.1% 0.093 311.2)
#581F77 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) | #00397A | 0.126 |
| Deuteranopia (no green cones) | #113C75 | 0.120 |
| Tritanopia (no blue cones) | #543249 | 0.098 |
| Achromatopsia (no color) | #3B3B3B | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #581F77
#581F77
oklch(37.1% 0.146 310.9)
- #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 #581F77, 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 0.054
- Grape Purple #5D1451 ΔE 0.068
- Rebecca Purple #663399 ΔE 0.074
- Dark Slate Blue #483D8B ΔE 0.075
- Plum Purple #4E0550 ΔE 0.080
- Rich Purple #720058 ΔE 0.082
- Purple #800080 ΔE 0.086
Use #581F77 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.