#4B3989
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.128 289.9), rgb(75, 57, 137).
Aa
White text reads best on this color (9.35:1).
About this color
#4B3989 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.128 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.011 away. White text reads best on it, at 9.35:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #4B3989 |
| RGB | rgb(75, 57, 137) |
| HSL | hsl(253, 41%, 38%) |
| OKLCH | oklch(40.8% 0.128 289.9) |
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 #4B3989 | 9.35:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #4B3989 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #4B3989 text on white | 9.35:1 | AAA | Lc 91.3 | Preferred for body text |
| #4B3989 text on black | 2.24:1 | Fails | Lc -11.0 | 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 800.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F3
oklch(88.5% 0.041 290.1)
-
Step 300
300
#BFB9EE
oklch(80.9% 0.074 289.8)
-
Step 400
400
#A093E6
oklch(70.7% 0.12 290.2)
-
Step 500
500
#8A76DE
oklch(63.1% 0.152 290.2)
-
Step 600
600
#755CCC
oklch(55.6% 0.167 290.2)
-
Step 700
700
#624BB0
oklch(49% 0.154 290)
-
Step 800
800 (this color)
#4B3989
oklch(40.8% 0.128 289.9)
-
Step 900
900
#423672
oklch(37.7% 0.099 290)
-
Step 950
950
#262043
oklch(27% 0.064 289.3)
#4B3989 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) | #08488C | 0.076 |
| Deuteranopia (no green cones) | #0D4587 | 0.074 |
| Tritanopia (no blue cones) | #394B5B | 0.106 |
| Achromatopsia (no color) | #474747 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3989
#4B3989
oklch(40.8% 0.128 289.9)
- #4D4D00
#4D4D00
oklch(40.7% 0.089 109.8)
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 #4B3989, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.011
- Blueberry #464196 ΔE 0.028
- Rebecca Purple #663399 ΔE 0.057
- Twilight #4E518B ΔE 0.065
- Cobalt #1E488F ΔE 0.065
- Dusk #4E5481 ΔE 0.078
- Dusk Blue #26538D ΔE 0.079
- Sapphire #2138AB ΔE 0.082
Use #4B3989 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.