#4B3588
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.133 291.5), rgb(75, 53, 136).
Aa
White text reads best on this color (9.70:1).
About this color
#4B3588 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.133 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.020 away. White text reads best on it, at 9.70:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #4B3588 |
| RGB | rgb(75, 53, 136) |
| HSL | hsl(256, 44%, 37%) |
| OKLCH | oklch(40.1% 0.133 291.5) |
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 #4B3588 | 9.70:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #4B3588 | 2.16:1 | Fails | Lc 11.8 | Not readable |
| #4B3588 text on white | 9.70:1 | AAA | Lc 92.2 | Preferred for body text |
| #4B3588 text on black | 2.16:1 | Fails | Lc -10.3 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#EAE7FC
oklch(93.7% 0.028 292.4)
-
Step 200
200
#D9D3FC
oklch(88.5% 0.056 291.9)
-
Step 300
300
#C1B5FC
oklch(80.8% 0.1 291.8)
-
Step 400
400
#A38CFB
oklch(70.8% 0.159 291.3)
-
Step 500
500
#8F6AF8
oklch(63.2% 0.203 291.5)
-
Step 600
600
#7B4CE7
oklch(55.7% 0.221 291.5)
-
Step 700
700
#683BC9
oklch(49.1% 0.206 291.5)
-
Step 800
800
#5432A2
oklch(42.6% 0.17 291.4)
-
Step 900
900 (this color)
#4B3588
oklch(40.1% 0.133 291.5)
-
Step 950
950
#281C4B
oklch(27% 0.084 291.6)
#4B3588 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) | #00468B | 0.083 |
| Deuteranopia (no green cones) | #014386 | 0.082 |
| Tritanopia (no blue cones) | #394859 | 0.108 |
| Achromatopsia (no color) | #444444 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3588
#4B3588
oklch(40.1% 0.133 291.5)
- #4A4C00
#4A4C00
oklch(40.1% 0.088 111.5)
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 #4B3588, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.020
- Blueberry #464196 ΔE 0.036
- Rebecca Purple #663399 ΔE 0.057
- Cobalt #1E488F ΔE 0.071
- Twilight #4E518B ΔE 0.074
- Imperial Purple #480CA8 ΔE 0.080
- Indigo #4B0082 ΔE 0.082
- Sapphire #2138AB ΔE 0.083
Use #4B3588 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.