#4D378C
Closest named color: Dark Slate Blue (#483D8B). oklch(40.9% 0.135 291.2), rgb(77, 55, 140).
Aa
White text reads best on this color (9.37:1).
About this color
#4D378C is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.135 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 0.016 away. White text reads best on it, at 9.37:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #4D378C |
| RGB | rgb(77, 55, 140) |
| HSL | hsl(256, 44%, 38%) |
| OKLCH | oklch(40.9% 0.135 291.2) |
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 #4D378C | 9.37:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #4D378C | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #4D378C text on white | 9.37:1 | AAA | Lc 91.3 | Preferred for body text |
| #4D378C text on black | 2.24:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D9D5F5
oklch(88.6% 0.044 291.2)
-
Step 300
300
#C0B8F0
oklch(80.8% 0.079 291.1)
-
Step 400
400
#A191E9
oklch(70.6% 0.127 291.1)
-
Step 500
500
#8C74E2
oklch(63.2% 0.161 291.1)
-
Step 600
600
#7759D0
oklch(55.5% 0.176 291.2)
-
Step 700
700
#6448B4
oklch(49% 0.164 291.1)
-
Step 800
800 (this color)
#4D378C
oklch(40.9% 0.135 291.2)
-
Step 900
900
#433474
oklch(37.6% 0.106 291.3)
-
Step 950
950
#271F44
oklch(26.9% 0.067 291.2)
#4D378C 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) | #00488F | 0.084 |
| Deuteranopia (no green cones) | #01458A | 0.083 |
| Tritanopia (no blue cones) | #3B4A5C | 0.109 |
| Achromatopsia (no color) | #464646 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D378C
#4D378C
oklch(40.9% 0.135 291.2)
- #4C4E00
#4C4E00
oklch(40.8% 0.09 111.5)
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 #4D378C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.016
- Blueberry #464196 ΔE 0.030
- Rebecca Purple #663399 ΔE 0.051
- Twilight #4E518B ΔE 0.069
- Cobalt #1E488F ΔE 0.070
- Imperial Purple #480CA8 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.081
- Sapphire #2138AB ΔE 0.081
Use #4D378C 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.