#4C3789
Closest named color: Dark Slate Blue (#483D8B). oklch(40.6% 0.131 291.2), rgb(76, 55, 137).
Aa
White text reads best on this color (9.48:1).
About this color
#4C3789 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.131 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 9.48:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #4C3789 |
| RGB | rgb(76, 55, 137) |
| HSL | hsl(255, 43%, 38%) |
| OKLCH | oklch(40.6% 0.131 291.2) |
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 #4C3789 | 9.48:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #4C3789 | 2.21:1 | Fails | Lc 12.3 | Not readable |
| #4C3789 text on white | 9.48:1 | AAA | Lc 91.6 | Preferred for body text |
| #4C3789 text on black | 2.21:1 | Fails | Lc -10.8 | 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
#D9D5F4
oklch(88.6% 0.042 291.4)
-
Step 300
300
#C0B8EF
oklch(80.8% 0.077 291.2)
-
Step 400
400
#A192E7
oklch(70.7% 0.123 291)
-
Step 500
500
#8C75DF
oklch(63.2% 0.155 291.3)
-
Step 600
600
#775BCD
oklch(55.7% 0.169 291.2)
-
Step 700
700
#644AB2
oklch(49.2% 0.158 290.9)
-
Step 800
800 (this color)
#4C3789
oklch(40.6% 0.131 291.2)
-
Step 900
900
#433573
oklch(37.7% 0.103 291.1)
-
Step 950
950
#272043
oklch(27.1% 0.064 290.7)
#4C3789 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) | #00478C | 0.082 |
| Deuteranopia (no green cones) | #084487 | 0.079 |
| Tritanopia (no blue cones) | #3B495A | 0.106 |
| Achromatopsia (no color) | #464646 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C3789
#4C3789
oklch(40.6% 0.131 291.2)
- #4B4D00
#4B4D00
oklch(40.5% 0.089 111.5)
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 #4C3789, 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 0.032
- Rebecca Purple #663399 ΔE 0.055
- Twilight #4E518B ΔE 0.069
- Cobalt #1E488F ΔE 0.069
- Imperial Purple #480CA8 ΔE 0.083
- Sapphire #2138AB ΔE 0.083
- Dusk #4E5481 ΔE 0.083
Use #4C3789 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.