#4B3778
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.107 295.2), rgb(75, 55, 120).
Aa
White text reads best on this color (9.92:1).
About this color
#4B3778 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.107 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 9.92:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.11:1 |
| White text | 9.92:1 |
Values
| HEX | #4B3778 |
| RGB | rgb(75, 55, 120) |
| HSL | hsl(258, 37%, 34%) |
| OKLCH | oklch(39.2% 0.107 295.2) |
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 #4B3778 | 9.92:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #4B3778 | 2.11:1 | Fails | Lc 11.1 | Not readable |
| #4B3778 text on white | 9.92:1 | AAA | Lc 92.8 | Preferred for body text |
| #4B3778 text on black | 2.11:1 | Fails | Lc -9.6 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F8
oklch(93.6% 0.023 296.7)
-
Step 200
200
#DBD4F4
oklch(88.5% 0.044 295.5)
-
Step 300
300
#C4B7F0
oklch(81% 0.081 295)
-
Step 400
400
#A78FE8
oklch(70.7% 0.129 295.3)
-
Step 500
500
#9371E1
oklch(63.2% 0.164 295.3)
-
Step 600
600
#7E56CE
oklch(55.6% 0.178 295.4)
-
Step 700
700
#6A45B3
oklch(49% 0.167 295)
-
Step 800
800
#573A91
oklch(42.8% 0.138 295.3)
-
Step 900
900 (this color)
#4B3778
oklch(39.2% 0.107 295.2)
-
Step 950
950
#291E44
oklch(26.9% 0.069 294.7)
#4B3778 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) | #1D437A | 0.067 |
| Deuteranopia (no green cones) | #224276 | 0.064 |
| Tritanopia (no blue cones) | #404452 | 0.085 |
| Achromatopsia (no color) | #434343 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3778
#4B3778
oklch(39.2% 0.107 295.2)
- #444B00
#444B00
oklch(39.3% 0.09 115.7)
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 #4B3778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.054
- Twilight #4E518B ΔE 0.074
- Rebecca Purple #663399 ΔE 0.074
- Cobalt #1E488F ΔE 0.076
- Twilight Blue #0A437A ΔE 0.079
- Dusk #4E5481 ΔE 0.081
- Light Navy #155084 ΔE 0.087
Use #4B3778 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.