#4B3780
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.118 292.9), rgb(75, 55, 128).
Aa
White text reads best on this color (9.73:1).
About this color
#4B3780 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.118 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.023 away. White text reads best on it, at 9.73:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #4B3780 |
| RGB | rgb(75, 55, 128) |
| HSL | hsl(256, 40%, 36%) |
| OKLCH | oklch(39.8% 0.118 292.9) |
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 #4B3780 | 9.73:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #4B3780 | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #4B3780 text on white | 9.73:1 | AAA | Lc 92.3 | Preferred for body text |
| #4B3780 text on black | 2.15:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7FA
oklch(93.6% 0.026 293.1)
-
Step 200
200
#DAD4F8
oklch(88.6% 0.049 293)
-
Step 300
300
#C2B6F5
oklch(80.8% 0.089 293)
-
Step 400
400
#A48EF1
oklch(70.7% 0.143 292.6)
-
Step 500
500
#906EEB
oklch(63.1% 0.181 293)
-
Step 600
600
#7B52DA
oklch(55.5% 0.198 292.7)
-
Step 700
700
#6842BD
oklch(49.1% 0.183 292.6)
-
Step 800
800
#553799
oklch(42.7% 0.152 292.9)
-
Step 900
900 (this color)
#4B3780
oklch(39.8% 0.118 292.9)
-
Step 950
950
#281D47
oklch(26.8% 0.076 292.7)
#4B3780 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) | #134582 | 0.074 |
| Deuteranopia (no green cones) | #19437E | 0.070 |
| Tritanopia (no blue cones) | #3D4656 | 0.094 |
| Achromatopsia (no color) | #444444 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3780
#4B3780
oklch(39.8% 0.118 292.9)
- #484C00
#484C00
oklch(39.9% 0.089 113.2)
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 #4B3780, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.023
- Blueberry #464196 ΔE 0.042
- Rebecca Purple #663399 ΔE 0.065
- Twilight #4E518B ΔE 0.071
- Cobalt #1E488F ΔE 0.071
- Twilight Blue #0A437A ΔE 0.080
- Dusk #4E5481 ΔE 0.081
- Dusk Blue #26538D ΔE 0.084
Use #4B3780 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.