#4E3F91
Closest named color: Dark Slate Blue (#483D8B). oklch(42.8% 0.13 288), rgb(78, 63, 145).
Aa
White text reads best on this color (8.59:1).
About this color
#4E3F91 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.130 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.015 away. White text reads best on it, at 8.59:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #4E3F91 |
| RGB | rgb(78, 63, 145) |
| HSL | hsl(251, 39%, 41%) |
| OKLCH | oklch(42.8% 0.13 288) |
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 #4E3F91 | 8.59:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #4E3F91 | 2.44:1 | Fails | Lc 14.7 | Not readable |
| #4E3F91 text on white | 8.59:1 | AAA | Lc 89.3 | Fine for body text |
| #4E3F91 text on black | 2.44:1 | Fails | Lc -13.0 | 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
#D7D5F4
oklch(88.4% 0.042 288.5)
-
Step 300
300
#BEB9F0
oklch(80.9% 0.077 288.7)
-
Step 400
400
#9D94E8
oklch(70.8% 0.121 287.8)
-
Step 500
500
#8777E1
oklch(63.2% 0.155 288.1)
-
Step 600
600
#725DCF
oklch(55.7% 0.169 288.1)
-
Step 700
700
#5F4CB3
oklch(49.1% 0.157 287.7)
-
Step 800
800 (this color)
#4E3F91
oklch(42.8% 0.13 288)
-
Step 900
900
#403673
oklch(37.6% 0.101 288.1)
-
Step 950
950
#252044
oklch(26.9% 0.065 287.6)
#4E3F91 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) | #124E94 | 0.072 |
| Deuteranopia (no green cones) | #124A8F | 0.071 |
| Tritanopia (no blue cones) | #395161 | 0.109 |
| Achromatopsia (no color) | #4C4C4C | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E3F91
#4E3F91
oklch(42.8% 0.13 288)
- #545200
#545200
oklch(42.7% 0.092 108.1)
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 #4E3F91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.015
- Blueberry #464196 ΔE 0.015
- Rebecca Purple #663399 ΔE 0.051
- Twilight #4E518B ΔE 0.051
- Cobalt #1E488F ΔE 0.063
- Dusk #4E5481 ΔE 0.068
- Dusk Blue #26538D ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.077
Use #4E3F91 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.