#393B91
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.139 277.2), rgb(57, 59, 145).
Aa
White text reads best on this color (9.50:1).
About this color
#393B91 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.139 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.027 away. White text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.20:1 |
| White text | 9.50:1 |
Values
| HEX | #393B91 |
| RGB | rgb(57, 59, 145) |
| HSL | hsl(239, 44%, 40%) |
| OKLCH | oklch(40.3% 0.139 277.2) |
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 #393B91 | 9.50:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #393B91 | 2.20:1 | Fails | Lc 12.3 | Not readable |
| #393B91 text on white | 9.50:1 | AAA | Lc 91.6 | Preferred for body text |
| #393B91 text on black | 2.20:1 | Fails | Lc -10.7 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D1D7F7
oklch(88.5% 0.044 277.1)
-
Step 300
300
#B3BCF5
oklch(80.8% 0.081 277.4)
-
Step 400
400
#8D98F0
oklch(70.7% 0.129 277.2)
-
Step 500
500
#737BEB
oklch(63% 0.166 277.4)
-
Step 600
600
#5D61DA
oklch(55.5% 0.181 277.3)
-
Step 700
700
#4D50BD
oklch(49.2% 0.168 277.1)
-
Step 800
800 (this color)
#393B91
oklch(40.3% 0.139 277.2)
-
Step 900
900
#353979
oklch(37.7% 0.107 277.3)
-
Step 950
950
#1F2247
oklch(27.1% 0.068 277.3)
#393B91 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) | #004994 | 0.053 |
| Deuteranopia (no green cones) | #00428F | 0.049 |
| Tritanopia (no blue cones) | #005060 | 0.120 |
| Achromatopsia (no color) | #464646 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393B91
#393B91
oklch(40.3% 0.139 277.2)
- #554800
#554800
oklch(40.3% 0.083 97.3)
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 #393B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.027
- Blueberry #464196 ΔE 0.028
- Cobalt #1E488F ΔE 0.042
- Sapphire #2138AB ΔE 0.053
- Twilight Blue #0A437A ΔE 0.064
- Dusk Blue #26538D ΔE 0.067
- Light Navy #155084 ΔE 0.069
- Twilight #4E518B ΔE 0.073
Use #393B91 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.