#4C3291
Closest named color: Dark Slate Blue (#483D8B). oklch(40.4% 0.149 290.8), rgb(76, 50, 145).
Aa
White text reads best on this color (9.66:1).
About this color
#4C3291 is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.149 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 0.029 away. White text reads best on it, at 9.66:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.17:1 |
| White text | 9.66:1 |
Values
| HEX | #4C3291 |
| RGB | rgb(76, 50, 145) |
| HSL | hsl(256, 49%, 38%) |
| OKLCH | oklch(40.4% 0.149 290.8) |
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 #4C3291 | 9.66:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #4C3291 | 2.17:1 | Fails | Lc 12.0 | Not readable |
| #4C3291 text on white | 9.66:1 | AAA | Lc 91.9 | Preferred for body text |
| #4C3291 text on black | 2.17:1 | Fails | Lc -10.5 | 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
#C0B7F5
oklch(80.8% 0.087 291)
-
Step 400
400
#A190F0
oklch(70.8% 0.138 290.6)
-
Step 500
500
#8C70EB
oklch(63% 0.178 290.9)
-
Step 600
600
#7855D9
oklch(55.6% 0.193 291)
-
Step 700
700
#6544BC
oklch(49.1% 0.179 291)
-
Step 800
800 (this color)
#4C3291
oklch(40.4% 0.149 290.8)
-
Step 900
900
#433279
oklch(37.6% 0.116 290.8)
-
Step 950
950
#271E47
oklch(26.9% 0.074 290.7)
#4C3291 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) | #004694 | 0.086 |
| Deuteranopia (no green cones) | #00428F | 0.085 |
| Tritanopia (no blue cones) | #37495D | 0.120 |
| Achromatopsia (no color) | #444444 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C3291
#4C3291
oklch(40.4% 0.149 290.8)
- #4B4C00
#4B4C00
oklch(40.2% 0.088 110.6)
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 #4C3291, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.036
- Rebecca Purple #663399 ΔE 0.051
- Imperial Purple #480CA8 ΔE 0.065
- Chrysanthemum #560BAD ΔE 0.067
- Sapphire #2138AB ΔE 0.075
- Indigo Blue #3A18B1 ΔE 0.076
- Cobalt #1E488F ΔE 0.076
Use #4C3291 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.