#5B1B7D
Closest named color: Indigo (#4B0082). oklch(37.6% 0.158 310.6), rgb(91, 27, 125).
Aa
White text reads best on this color (11.06:1).
About this color
#5B1B7D is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.158 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.050 away. White text reads best on it, at 11.06:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #5B1B7D |
| RGB | rgb(91, 27, 125) |
| HSL | hsl(279, 64%, 30%) |
| OKLCH | oklch(37.6% 0.158 310.6) |
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 #5B1B7D | 11.06:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #5B1B7D | 1.89:1 | Fails | Lc 9.3 | Not readable |
| #5B1B7D text on white | 11.06:1 | AAA | Lc 94.6 | Preferred for body text |
| #5B1B7D text on black | 1.89:1 | Fails | Lc -8.0 | 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
#F9F3FE
oklch(97.2% 0.016 310.1)
-
Step 100
100
#F1E4FB
oklch(93.6% 0.034 310.7)
-
Step 200
200
#E7CEFA
oklch(88.6% 0.065 310.5)
-
Step 300
300
#D9ABF9
oklch(81% 0.118 310.8)
-
Step 400
400
#C579F6
oklch(70.7% 0.189 310.5)
-
Step 500
500
#B74DF2
oklch(63.2% 0.241 310.8)
-
Step 600
600
#A31FE1
oklch(55.7% 0.263 310.7)
-
Step 700
700
#8B06C3
oklch(49.1% 0.244 310.6)
-
Step 800
800
#71129E
oklch(42.7% 0.202 310.6)
-
Step 900
900 (this color)
#5B1B7D
oklch(37.6% 0.158 310.6)
-
Step 950
950
#361349
oklch(27.1% 0.099 311.3)
#5B1B7D 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) | #003980 | 0.132 |
| Deuteranopia (no green cones) | #043D7B | 0.133 |
| Tritanopia (no blue cones) | #56324B | 0.106 |
| Achromatopsia (no color) | #3C3C3C | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B1B7D
#5B1B7D
oklch(37.6% 0.158 310.6)
- #2E4B00
#2E4B00
oklch(37.5% 0.101 130.3)
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 #5B1B7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.050
- Royal Purple #4B006E ΔE 0.057
- Rebecca Purple #663399 ΔE 0.068
- Grape Purple #5D1451 ΔE 0.077
- Dark Slate Blue #483D8B ΔE 0.079
- Purple #800080 ΔE 0.079
- Chrysanthemum #560BAD ΔE 0.082
- Rich Purple #720058 ΔE 0.084
Use #5B1B7D 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.