#4D378D
Closest named color: Dark Slate Blue (#483D8B). oklch(41% 0.136 290.9), rgb(77, 55, 141).
Aa
White text reads best on this color (9.34:1).
About this color
#4D378D is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.136 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 0.017 away. White text reads best on it, at 9.34:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #4D378D |
| RGB | rgb(77, 55, 141) |
| HSL | hsl(255, 44%, 38%) |
| OKLCH | oklch(41% 0.136 290.9) |
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 #4D378D | 9.34:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #4D378D | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #4D378D text on white | 9.34:1 | AAA | Lc 91.2 | Preferred for body text |
| #4D378D text on black | 2.24:1 | Fails | Lc -11.1 | 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
#C0B8F1
oklch(80.9% 0.08 290.9)
-
Step 400
400
#A191EA
oklch(70.6% 0.128 291)
-
Step 500
500
#8C73E3
oklch(63% 0.164 291.3)
-
Step 600
600
#7759D1
oklch(55.6% 0.177 291)
-
Step 700
700
#6448B5
oklch(49.1% 0.165 290.9)
-
Step 800
800 (this color)
#4D378D
oklch(41% 0.136 290.9)
-
Step 900
900
#433475
oklch(37.7% 0.107 291)
-
Step 950
950
#271F44
oklch(26.9% 0.067 291.2)
#4D378D 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) | #004890 | 0.084 |
| Deuteranopia (no green cones) | #00458B | 0.083 |
| Tritanopia (no blue cones) | #3A4A5C | 0.111 |
| Achromatopsia (no color) | #474747 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D378D
#4D378D
oklch(41% 0.136 290.9)
- #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 #4D378D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.017
- Blueberry #464196 ΔE 0.029
- Rebecca Purple #663399 ΔE 0.050
- Twilight #4E518B ΔE 0.069
- Cobalt #1E488F ΔE 0.070
- Imperial Purple #480CA8 ΔE 0.079
- Chrysanthemum #560BAD ΔE 0.080
- Sapphire #2138AB ΔE 0.080
Use #4D378D 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.