#5B187F
Closest named color: Indigo (#4B0082). oklch(37.4% 0.163 310.1), rgb(91, 24, 127).
Aa
White text reads best on this color (11.15:1).
About this color
#5B187F is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.163 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.046 away. White text reads best on it, at 11.15:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.88:1 |
| White text | 11.15:1 |
Values
| HEX | #5B187F |
| RGB | rgb(91, 24, 127) |
| HSL | hsl(279, 68%, 30%) |
| OKLCH | oklch(37.4% 0.163 310.1) |
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 #5B187F | 11.15:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #5B187F | 1.88:1 | Fails | Lc 9.2 | Not readable |
| #5B187F text on white | 11.15:1 | AAA | Lc 94.7 | Preferred for body text |
| #5B187F text on black | 1.88:1 | Fails | Lc -7.9 | 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
#F1E4FC
oklch(93.6% 0.035 309.8)
-
Step 200
200
#E7CDFB
oklch(88.4% 0.068 310.4)
-
Step 300
300
#D9AAFC
oklch(80.9% 0.123 310)
-
Step 400
400
#C677FA
oklch(70.7% 0.196 310.1)
-
Step 500
500
#B749F6
oklch(63% 0.25 310.2)
-
Step 600
600
#A315E5
oklch(55.6% 0.271 310.1)
-
Step 700
700
#8B00C5
oklch(49.1% 0.248 310.2)
-
Step 800
800
#710AA1
oklch(42.6% 0.209 309.9)
-
Step 900
900 (this color)
#5B187F
oklch(37.4% 0.163 310.1)
-
Step 950
950
#36124B
oklch(27.1% 0.103 310.2)
#5B187F 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) | #003882 | 0.133 |
| Deuteranopia (no green cones) | #003C7D | 0.136 |
| Tritanopia (no blue cones) | #56324B | 0.112 |
| Achromatopsia (no color) | #3B3B3B | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B187F
#5B187F
oklch(37.4% 0.163 310.1)
- #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 #5B187F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.046
- Royal Purple #4B006E ΔE 0.055
- Rebecca Purple #663399 ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.079
- Purple #800080 ΔE 0.079
- Grape Purple #5D1451 ΔE 0.080
- Dark Slate Blue #483D8B ΔE 0.081
- Imperial Purple #480CA8 ΔE 0.084
Use #5B187F 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.