#4D3D91
Closest named color: Dark Slate Blue (#483D8B). oklch(42.3% 0.133 288.1), rgb(77, 61, 145).
Aa
White text reads best on this color (8.77:1).
About this color
#4D3D91 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.133 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.013 away. White text reads best on it, at 8.77:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #4D3D91 |
| RGB | rgb(77, 61, 145) |
| HSL | hsl(251, 41%, 40%) |
| OKLCH | oklch(42.3% 0.133 288.1) |
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 #4D3D91 | 8.77:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #4D3D91 | 2.39:1 | Fails | Lc 14.2 | Not readable |
| #4D3D91 text on white | 8.77:1 | AAA | Lc 89.8 | Fine for body text |
| #4D3D91 text on black | 2.39:1 | Fails | Lc -12.5 | 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 800.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BEB9F1
oklch(80.9% 0.079 288.6)
-
Step 400
400
#9D93E9
oklch(70.6% 0.124 288.1)
-
Step 500
500
#8776E3
oklch(63.1% 0.159 288.1)
-
Step 600
600
#725CD1
oklch(55.7% 0.173 288.1)
-
Step 700
700
#604BB5
oklch(49.2% 0.161 288.1)
-
Step 800
800 (this color)
#4D3D91
oklch(42.3% 0.133 288.1)
-
Step 900
900
#403675
oklch(37.7% 0.104 287.6)
-
Step 950
950
#252044
oklch(26.9% 0.065 287.6)
#4D3D91 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) | #084D94 | 0.076 |
| Deuteranopia (no green cones) | #09488F | 0.075 |
| Tritanopia (no blue cones) | #385061 | 0.110 |
| Achromatopsia (no color) | #4B4B4B | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D3D91
#4D3D91
oklch(42.3% 0.133 288.1)
- #535100
#535100
oklch(42.3% 0.091 108.1)
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 #4D3D91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.013
- Blueberry #464196 ΔE 0.016
- Rebecca Purple #663399 ΔE 0.050
- Twilight #4E518B ΔE 0.056
- Cobalt #1E488F ΔE 0.064
- Dusk #4E5481 ΔE 0.073
- Dusk Blue #26538D ΔE 0.073
- Sapphire #2138AB ΔE 0.077
Use #4D3D91 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.