#393F83
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.113 276.3), rgb(57, 63, 131).
Aa
White text reads best on this color (9.49:1).
About this color
#393F83 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.113 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #393F83 |
| RGB | rgb(57, 63, 131) |
| HSL | hsl(235, 39%, 37%) |
| OKLCH | oklch(40% 0.113 276.3) |
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 #393F83 | 9.49:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #393F83 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #393F83 text on white | 9.49:1 | AAA | Lc 91.7 | Preferred for body text |
| #393F83 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7F9
oklch(88.5% 0.047 276.2)
-
Step 300
300
#B2BCF8
oklch(80.9% 0.086 277)
-
Step 400
400
#8B98F4
oklch(70.8% 0.135 276.3)
-
Step 500
500
#707BEF
oklch(63.1% 0.172 276.2)
-
Step 600
600
#5A61DE
oklch(55.6% 0.187 276)
-
Step 700
700
#4B4FC1
oklch(49.1% 0.175 276.3)
-
Step 800
800
#3D419C
oklch(42.6% 0.145 276.4)
-
Step 900
900 (this color)
#393F83
oklch(40% 0.113 276.3)
-
Step 950
950
#1E2249
oklch(27.1% 0.072 276.1)
#393F83 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) | #1D4985 | 0.038 |
| Deuteranopia (no green cones) | #124382 | 0.041 |
| Tritanopia (no blue cones) | #144E5B | 0.098 |
| Achromatopsia (no color) | #464646 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393F83
#393F83
oklch(40% 0.113 276.3)
- #554700
#554700
oklch(40% 0.082 96.2)
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 #393F83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.038
- Cobalt #1E488F ΔE 0.039
- Twilight Blue #0A437A ΔE 0.049
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.057
- Twilight #4E518B ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.069
Use #393F83 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.