#4D3990
Closest named color: Dark Slate Blue (#483D8B). oklch(41.6% 0.138 289.6), rgb(77, 57, 144).
Aa
White text reads best on this color (9.11:1).
About this color
#4D3990 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.138 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.015 away. White text reads best on it, at 9.11:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #4D3990 |
| RGB | rgb(77, 57, 144) |
| HSL | hsl(254, 43%, 39%) |
| OKLCH | oklch(41.6% 0.138 289.6) |
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 #4D3990 | 9.11:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #4D3990 | 2.30:1 | Fails | Lc 13.3 | Not readable |
| #4D3990 text on white | 9.11:1 | AAA | Lc 90.6 | Preferred for body text |
| #4D3990 text on black | 2.30:1 | Fails | Lc -11.7 | 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
#D8D5F5
oklch(88.5% 0.044 289.8)
-
Step 300
300
#BFB8F2
oklch(80.8% 0.081 290)
-
Step 400
400
#9F92EB
oklch(70.7% 0.128 289.4)
-
Step 500
500
#8A74E5
oklch(63.2% 0.165 289.8)
-
Step 600
600
#755AD3
oklch(55.7% 0.178 289.6)
-
Step 700
700
#6249B6
oklch(49.1% 0.165 289.5)
-
Step 800
800 (this color)
#4D3990
oklch(41.6% 0.138 289.6)
-
Step 900
900
#423576
oklch(37.8% 0.107 289.5)
-
Step 950
950
#261F45
oklch(26.9% 0.069 289.4)
#4D3990 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) | #004A93 | 0.082 |
| Deuteranopia (no green cones) | #00468E | 0.081 |
| Tritanopia (no blue cones) | #384D5F | 0.113 |
| Achromatopsia (no color) | #484848 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D3990
#4D3990
oklch(41.6% 0.138 289.6)
- #504F00
#504F00
oklch(41.5% 0.09 108.9)
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 #4D3990, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.015
- Blueberry #464196 ΔE 0.023
- Rebecca Purple #663399 ΔE 0.049
- Twilight #4E518B ΔE 0.065
- Cobalt #1E488F ΔE 0.068
- Sapphire #2138AB ΔE 0.077
- Imperial Purple #480CA8 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.080
Use #4D3990 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.