#4B3F81
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.107 289.2), rgb(75, 63, 129).
Aa
White text reads best on this color (9.02:1).
About this color
#4B3F81 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.107 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.019 away. White text reads best on it, at 9.02:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #4B3F81 |
| RGB | rgb(75, 63, 129) |
| HSL | hsl(251, 34%, 38%) |
| OKLCH | oklch(41.4% 0.107 289.2) |
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 #4B3F81 | 9.02:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #4B3F81 | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #4B3F81 text on white | 9.02:1 | AAA | Lc 90.6 | Preferred for body text |
| #4B3F81 text on black | 2.32:1 | Fails | Lc -11.7 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D8D6EF
oklch(88.5% 0.034 289.4)
-
Step 300
300
#BFBBE7
oklch(81% 0.062 289.1)
-
Step 400
400
#9F96DB
oklch(70.7% 0.1 289.6)
-
Step 500
500
#887BD1
oklch(63.1% 0.127 289.2)
-
Step 600
600
#7362BE
oklch(55.6% 0.139 289.6)
-
Step 700
700
#6051A4
oklch(49.1% 0.129 289.1)
-
Step 800
800 (this color)
#4B3F81
oklch(41.4% 0.107 289.2)
-
Step 900
900
#41396B
oklch(37.8% 0.084 289.1)
-
Step 950
950
#26223E
oklch(27.1% 0.051 289.1)
#4B3F81 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) | #244A83 | 0.056 |
| Deuteranopia (no green cones) | #25477F | 0.054 |
| Tritanopia (no blue cones) | #3C4C5A | 0.088 |
| Achromatopsia (no color) | #494949 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3F81
#4B3F81
oklch(41.4% 0.107 289.2)
- #4F4F00
#4F4F00
oklch(41.4% 0.09 109.8)
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 #4B3F81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.019
- Blueberry #464196 ΔE 0.035
- Twilight #4E518B ΔE 0.051
- Dusk #4E5481 ΔE 0.060
- Cobalt #1E488F ΔE 0.062
- Dusk Blue #26538D ΔE 0.067
- Rebecca Purple #663399 ΔE 0.068
- Light Navy #155084 ΔE 0.072
Use #4B3F81 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.