#393E78
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.097 277.2), rgb(57, 62, 120).
Aa
White text reads best on this color (9.83:1).
About this color
#393E78 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.097 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 9.83:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #393E78 |
| RGB | rgb(57, 62, 120) |
| HSL | hsl(235, 36%, 35%) |
| OKLCH | oklch(39% 0.097 277.2) |
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 #393E78 | 9.83:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #393E78 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #393E78 text on white | 9.83:1 | AAA | Lc 92.7 | Preferred for body text |
| #393E78 text on black | 2.13:1 | Fails | Lc -9.8 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D7F4
oklch(88.4% 0.04 277.8)
-
Step 300
300
#B4BDF0
oklch(80.9% 0.073 276.8)
-
Step 400
400
#8F99E9
oklch(70.7% 0.117 277.5)
-
Step 500
500
#747EE2
oklch(63.1% 0.149 276.9)
-
Step 600
600
#5E65D0
oklch(55.6% 0.162 276.9)
-
Step 700
700
#4E53B4
oklch(49.1% 0.151 277.1)
-
Step 800
800
#404491
oklch(42.6% 0.125 277.5)
-
Step 900
900 (this color)
#393E78
oklch(39% 0.097 277.2)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#393E78 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) | #25467A | 0.031 |
| Deuteranopia (no green cones) | #1F4177 | 0.032 |
| Tritanopia (no blue cones) | #204A55 | 0.084 |
| Achromatopsia (no color) | #434343 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393E78
#393E78
oklch(39% 0.097 277.2)
- #514500
#514500
oklch(39.1% 0.081 97.9)
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 #393E78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.040
- Twilight Blue #0A437A ΔE 0.046
- Cobalt #1E488F ΔE 0.050
- Blueberry #464196 ΔE 0.055
- Light Navy #155084 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.064
- Dusk Blue #26538D ΔE 0.065
- Marine Blue #01386A ΔE 0.066
Use #393E78 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.