#393D81
Closest named color: Dark Slate Blue (#483D8B). oklch(39.4% 0.113 277.4), rgb(57, 61, 129).
Aa
White text reads best on this color (9.72:1).
About this color
#393D81 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.113 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 9.72:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #393D81 |
| RGB | rgb(57, 61, 129) |
| HSL | hsl(237, 39%, 36%) |
| OKLCH | oklch(39.4% 0.113 277.4) |
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 #393D81 | 9.72:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #393D81 | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #393D81 text on white | 9.72:1 | AAA | Lc 92.3 | Preferred for body text |
| #393D81 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B3BCF7
oklch(80.9% 0.084 277.6)
-
Step 400
400
#8C97F3
oklch(70.6% 0.135 277.2)
-
Step 500
500
#727AEF
oklch(63% 0.173 277.3)
-
Step 600
600
#5D60DE
oklch(55.7% 0.188 277.4)
-
Step 700
700
#4D4EC0
oklch(49% 0.174 277.4)
-
Step 800
800
#3F419C
oklch(42.8% 0.145 277.4)
-
Step 900
900 (this color)
#393D81
oklch(39.4% 0.113 277.4)
-
Step 950
950
#1F2148
oklch(26.9% 0.071 278.2)
#393D81 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) | #1A4783 | 0.041 |
| Deuteranopia (no green cones) | #104180 | 0.043 |
| Tritanopia (no blue cones) | #174C59 | 0.098 |
| Achromatopsia (no color) | #444444 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393D81
#393D81
oklch(39.4% 0.113 277.4)
- #524600
#524600
oklch(39.5% 0.082 98)
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 #393D81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.043
- Twilight Blue #0A437A ΔE 0.049
- Light Navy #155084 ΔE 0.059
- Dusk Blue #26538D ΔE 0.062
- Twilight #4E518B ΔE 0.068
- Marine Blue #01386A ΔE 0.073
Use #393D81 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.