#393C78
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.1 278.4), rgb(57, 60, 120).
Aa
White text reads best on this color (10.04:1).
About this color
#393C78 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.100 and its hue 278°. 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 10.04:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.04:1 |
Values
| HEX | #393C78 |
| RGB | rgb(57, 60, 120) |
| HSL | hsl(237, 36%, 35%) |
| OKLCH | oklch(38.6% 0.1 278.4) |
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 #393C78 | 10.04:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #393C78 | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #393C78 text on white | 10.04:1 | AAA | Lc 93.1 | Preferred for body text |
| #393C78 text on black | 2.09:1 | Fails | Lc -9.3 | 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
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B5BCF1
oklch(80.8% 0.075 278.7)
-
Step 400
400
#9098EA
oklch(70.6% 0.12 278.6)
-
Step 500
500
#767CE4
oklch(63% 0.154 278.5)
-
Step 600
600
#6063D2
oklch(55.5% 0.167 278.3)
-
Step 700
700
#5051B6
oklch(49% 0.156 278.5)
-
Step 800
800
#414393
oklch(42.6% 0.129 278.3)
-
Step 900
900 (this color)
#393C78
oklch(38.6% 0.1 278.4)
-
Step 950
950
#202245
oklch(27% 0.064 278.7)
#393C78 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) | #21457A | 0.036 |
| Deuteranopia (no green cones) | #1B4077 | 0.037 |
| Tritanopia (no blue cones) | #204954 | 0.088 |
| Achromatopsia (no color) | #424242 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #393C78
#393C78
oklch(38.6% 0.1 278.4)
- #4F4400
#4F4400
oklch(38.6% 0.08 98.7)
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 #393C78, 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 0.047
- Cobalt #1E488F ΔE 0.053
- Blueberry #464196 ΔE 0.055
- Light Navy #155084 ΔE 0.063
- Marine Blue #01386A ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
Use #393C78 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.