#4D3591
Closest named color: Dark Slate Blue (#483D8B). oklch(41% 0.145 290.6), rgb(77, 53, 145).
Aa
White text reads best on this color (9.40:1).
About this color
#4D3591 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.145 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 0.023 away. White text reads best on it, at 9.40:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #4D3591 |
| RGB | rgb(77, 53, 145) |
| HSL | hsl(256, 46%, 39%) |
| OKLCH | oklch(41% 0.145 290.6) |
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 #4D3591 | 9.40:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #4D3591 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #4D3591 text on white | 9.40:1 | AAA | Lc 91.3 | Preferred for body text |
| #4D3591 text on black | 2.23:1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F7
oklch(88.4% 0.048 290.6)
-
Step 300
300
#C0B8F4
oklch(81% 0.084 290.5)
-
Step 400
400
#A190EE
oklch(70.7% 0.135 290.8)
-
Step 500
500
#8B72E9
oklch(63.2% 0.173 290.2)
-
Step 600
600
#7757D7
oklch(55.7% 0.188 290.5)
-
Step 700
700
#6446BA
oklch(49.1% 0.174 290.4)
-
Step 800
800 (this color)
#4D3591
oklch(41% 0.145 290.6)
-
Step 900
900
#433378
oklch(37.7% 0.113 290.6)
-
Step 950
950
#271F46
oklch(27.1% 0.07 290.3)
#4D3591 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) | #004894 | 0.085 |
| Deuteranopia (no green cones) | #00448F | 0.084 |
| Tritanopia (no blue cones) | #384A5E | 0.116 |
| Achromatopsia (no color) | #464646 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D3591
#4D3591
oklch(41% 0.145 290.6)
- #4D4E00
#4D4E00
oklch(40.9% 0.09 110.6)
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 #4D3591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.023
- Blueberry #464196 ΔE 0.030
- Rebecca Purple #663399 ΔE 0.048
- Imperial Purple #480CA8 ΔE 0.071
- Chrysanthemum #560BAD ΔE 0.072
- Cobalt #1E488F ΔE 0.073
- Twilight #4E518B ΔE 0.075
- Sapphire #2138AB ΔE 0.076
Use #4D3591 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.