#383E78
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.097 276.4), rgb(56, 62, 120).
Aa
White text reads best on this color (9.86:1).
About this color
#383E78 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.097 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.041 away. White text reads best on it, at 9.86:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.12:1 |
| White text | 9.86:1 |
Values
| HEX | #383E78 |
| RGB | rgb(56, 62, 120) |
| HSL | hsl(234, 36%, 35%) |
| OKLCH | oklch(38.9% 0.097 276.4) |
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 #383E78 | 9.86:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #383E78 | 2.12:1 | Fails | Lc 11.2 | Not readable |
| #383E78 text on white | 9.86:1 | AAA | Lc 92.7 | Preferred for body text |
| #383E78 text on black | 2.12:1 | Fails | Lc -9.7 | 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 900.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D1D7F5
oklch(88.4% 0.042 276.6)
-
Step 300
300
#B4BDF0
oklch(80.9% 0.073 276.8)
-
Step 400
400
#8D99E9
oklch(70.6% 0.118 276.4)
-
Step 500
500
#737EE2
oklch(63.1% 0.149 276.5)
-
Step 600
600
#5D65D0
oklch(55.6% 0.163 276.5)
-
Step 700
700
#4D53B4
oklch(49% 0.151 276.6)
-
Step 800
800
#3F4592
oklch(42.8% 0.125 276.4)
-
Step 900
900 (this color)
#383E78
oklch(38.9% 0.097 276.4)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#383E78 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 | 0.030 |
| Deuteranopia (no green cones) | #1E4177 | 0.032 |
| Tritanopia (no blue cones) | #1D4B55 | 0.087 |
| Achromatopsia (no color) | #434343 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383E78
#383E78
oklch(38.9% 0.097 276.4)
- #514400
#514400
oklch(38.8% 0.08 96.7)
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 #383E78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight Blue #0A437A ΔE 0.044
- Cobalt #1E488F ΔE 0.049
- Blueberry #464196 ΔE 0.055
- Light Navy #155084 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.064
- Dusk Blue #26538D ΔE 0.064
- Marine Blue #01386A ΔE 0.065
Use #383E78 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.