#4B3786
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.127 291.3), rgb(75, 55, 134).
Aa
White text reads best on this color (9.58:1).
About this color
#4B3786 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.127 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 9.58:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.18:1 |
| White text | 9.58:1 |
Values
| HEX | #4B3786 |
| RGB | rgb(75, 55, 134) |
| HSL | hsl(255, 42%, 37%) |
| OKLCH | oklch(40.3% 0.127 291.3) |
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 #4B3786 | 9.58:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #4B3786 | 2.18:1 | Fails | Lc 12.0 | Not readable |
| #4B3786 text on white | 9.58:1 | AAA | Lc 91.9 | Preferred for body text |
| #4B3786 text on black | 2.18:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D9D5F3
oklch(88.5% 0.041 291.7)
-
Step 300
300
#C0B9ED
oklch(80.9% 0.073 290.8)
-
Step 400
400
#A193E5
oklch(70.8% 0.118 290.9)
-
Step 500
500
#8C76DD
oklch(63.2% 0.151 291.3)
-
Step 600
600
#775CCA
oklch(55.6% 0.164 291.5)
-
Step 700
700
#644BAF
oklch(49.1% 0.153 291.3)
-
Step 800
800 (this color)
#4B3786
oklch(40.3% 0.127 291.3)
-
Step 900
900
#433671
oklch(37.8% 0.098 291.1)
-
Step 950
950
#272042
oklch(27% 0.062 291.2)
#4B3786 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) | #074689 | 0.079 |
| Deuteranopia (no green cones) | #0E4384 | 0.076 |
| Tritanopia (no blue cones) | #3A4859 | 0.102 |
| Achromatopsia (no color) | #454545 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3786
#4B3786
oklch(40.3% 0.127 291.3)
- #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 #4B3786, 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 0.035
- Rebecca Purple #663399 ΔE 0.059
- Cobalt #1E488F ΔE 0.069
- Twilight #4E518B ΔE 0.070
- Dusk #4E5481 ΔE 0.082
- Twilight Blue #0A437A ΔE 0.082
- Dusk Blue #26538D ΔE 0.083
Use #4B3786 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.