#5B187C
Closest named color: Indigo (#4B0082). oklch(37.2% 0.16 311.3), rgb(91, 24, 124).
Aa
White text reads best on this color (11.25:1).
About this color
#5B187C is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.160 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.048 away. White text reads best on it, at 11.25:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.86:1 |
| White text | 11.25:1 |
Values
| HEX | #5B187C |
| RGB | rgb(91, 24, 124) |
| HSL | hsl(280, 68%, 29%) |
| OKLCH | oklch(37.2% 0.16 311.3) |
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 #5B187C | 11.25:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #5B187C | 1.86:1 | Fails | Lc 9.0 | Not readable |
| #5B187C text on white | 11.25:1 | AAA | Lc 94.9 | Preferred for body text |
| #5B187C text on black | 1.86:1 | Fails | Lc -7.7 | 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
#E8CDFA
oklch(88.5% 0.067 311.8)
-
Step 300
300
#DAAAF9
oklch(80.9% 0.12 311.6)
-
Step 400
400
#C777F6
oklch(70.6% 0.192 311.5)
-
Step 500
500
#B94AF2
oklch(63.1% 0.245 311.6)
-
Step 600
600
#A419E1
oklch(55.5% 0.267 311.2)
-
Step 700
700
#8D00C3
oklch(49.2% 0.247 311.4)
-
Step 800
800
#720D9E
oklch(42.6% 0.206 311.2)
-
Step 900
900 (this color)
#5B187C
oklch(37.2% 0.16 311.3)
-
Step 950
950
#36124A
oklch(27% 0.102 310.9)
#5B187C 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) | #00387F | 0.134 |
| Deuteranopia (no green cones) | #013C7A | 0.137 |
| Tritanopia (no blue cones) | #57304A | 0.106 |
| Achromatopsia (no color) | #3B3B3B | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B187C
#5B187C
oklch(37.2% 0.16 311.3)
- #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 #5B187C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.048
- Royal Purple #4B006E ΔE 0.053
- Rebecca Purple #663399 ΔE 0.072
- Grape Purple #5D1451 ΔE 0.075
- Purple #800080 ΔE 0.079
- Rich Purple #720058 ΔE 0.083
- Dark Slate Blue #483D8B ΔE 0.083
- Chrysanthemum #560BAD ΔE 0.084
Use #5B187C 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.