#4B3881
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.118 292.2), rgb(75, 56, 129).
Aa
White text reads best on this color (9.62:1).
About this color
#4B3881 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.118 and its hue 292°. 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 9.62:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #4B3881 |
| RGB | rgb(75, 56, 129) |
| HSL | hsl(256, 39%, 36%) |
| OKLCH | oklch(40.1% 0.118 292.2) |
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 #4B3881 | 9.62:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #4B3881 | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #4B3881 text on white | 9.62:1 | AAA | Lc 92.0 | Preferred for body text |
| #4B3881 text on black | 2.18:1 | Fails | Lc -10.4 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7FA
oklch(93.6% 0.026 293.1)
-
Step 200
200
#D9D4F8
oklch(88.5% 0.049 291.7)
-
Step 300
300
#C1B7F6
oklch(81% 0.088 291.6)
-
Step 400
400
#A38EF1
oklch(70.6% 0.143 292.1)
-
Step 500
500
#8F6FEC
oklch(63.2% 0.181 292.2)
-
Step 600
600
#7A53DA
oklch(55.6% 0.197 292.1)
-
Step 700
700
#6742BD
oklch(49% 0.183 292.1)
-
Step 800
800
#543799
oklch(42.6% 0.152 292.3)
-
Step 900
900 (this color)
#4B3881
oklch(40.1% 0.118 292.2)
-
Step 950
950
#281E47
oklch(27% 0.074 292)
#4B3881 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) | #154683 | 0.072 |
| Deuteranopia (no green cones) | #19437F | 0.069 |
| Tritanopia (no blue cones) | #3D4757 | 0.094 |
| Achromatopsia (no color) | #454545 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3881
#4B3881
oklch(40.1% 0.118 292.2)
- #494C00
#494C00
oklch(40% 0.089 112.4)
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 #4B3881, 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 0.040
- Rebecca Purple #663399 ΔE 0.064
- Twilight #4E518B ΔE 0.068
- Cobalt #1E488F ΔE 0.069
- Dusk #4E5481 ΔE 0.079
- Twilight Blue #0A437A ΔE 0.080
- Dusk Blue #26538D ΔE 0.082
Use #4B3881 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.