#4B2581
Closest named color: Indigo (#4B0082). oklch(37% 0.146 297.7), rgb(75, 37, 129).
Aa
White text reads best on this color (11.16:1).
About this color
#4B2581 is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.146 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.047 away. White text reads best on it, at 11.16:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #4B2581 |
| RGB | rgb(75, 37, 129) |
| HSL | hsl(265, 55%, 33%) |
| OKLCH | oklch(37% 0.146 297.7) |
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 #4B2581 | 11.16:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #4B2581 | 1.88:1 | Fails | Lc 8.7 | Not readable |
| #4B2581 text on white | 11.16:1 | AAA | Lc 95.2 | Preferred for body text |
| #4B2581 text on black | 1.88:1 | Fails | Lc -7.5 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FD
oklch(93.6% 0.031 297.7)
-
Step 200
200
#DDD1FD
oklch(88.4% 0.061 297.6)
-
Step 300
300
#C9B1FF
oklch(80.9% 0.111 298)
-
Step 400
400
#AF84FE
oklch(70.6% 0.176 298)
-
Step 500
500
#9D5FFC
oklch(63.2% 0.223 297.8)
-
Step 600
600
#893CEB
oklch(55.5% 0.244 297.8)
-
Step 700
700
#742CCD
oklch(49.1% 0.226 297.4)
-
Step 800
800
#5F27A6
oklch(42.8% 0.188 297.8)
-
Step 900
900 (this color)
#4B2581
oklch(37% 0.146 297.7)
-
Step 950
950
#2D184D
oklch(27% 0.094 298.1)
#4B2581 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) | #003B84 | 0.097 |
| Deuteranopia (no green cones) | #003A7F | 0.097 |
| Tritanopia (no blue cones) | #3E3B50 | 0.111 |
| Achromatopsia (no color) | #3B3B3B | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B2581
#4B2581
oklch(37% 0.146 297.7)
- #3C4500
#3C4500
oklch(36.9% 0.086 117.8)
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 #4B2581, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.056
- Royal Purple #4B006E ΔE 0.062
- Imperial Purple #480CA8 ΔE 0.070
- Blueberry #464196 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.073
- Chrysanthemum #560BAD ΔE 0.077
- Indigo Blue #3A18B1 ΔE 0.090
Use #4B2581 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.