#383F79
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.098 275.8), rgb(56, 63, 121).
Aa
White text reads best on this color (9.74:1).
About this color
#383F79 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.098 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 9.74:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #383F79 |
| RGB | rgb(56, 63, 121) |
| HSL | hsl(234, 37%, 35%) |
| OKLCH | oklch(39.2% 0.098 275.8) |
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 #383F79 | 9.74:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #383F79 | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #383F79 text on white | 9.74:1 | AAA | Lc 92.4 | Preferred for body text |
| #383F79 text on black | 2.15:1 | Fails | Lc -10.0 | 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
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B3BDF0
oklch(80.8% 0.073 276)
-
Step 400
400
#8C9AE9
oklch(70.7% 0.117 275.4)
-
Step 500
500
#727FE2
oklch(63.2% 0.148 275.7)
-
Step 600
600
#5C66D0
oklch(55.7% 0.161 275.8)
-
Step 700
700
#4C54B4
oklch(49.2% 0.15 275.8)
-
Step 800
800
#3E4592
oklch(42.7% 0.125 275.8)
-
Step 900
900 (this color)
#383F79
oklch(39.2% 0.098 275.8)
-
Step 950
950
#1E2344
oklch(27% 0.061 275)
#383F79 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) | #26477B | 0.029 |
| Deuteranopia (no green cones) | #1F4178 | 0.031 |
| Tritanopia (no blue cones) | #1C4C56 | 0.087 |
| Achromatopsia (no color) | #444444 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383F79
#383F79
oklch(39.2% 0.098 275.8)
- #534500
#534500
oklch(39.3% 0.081 95.8)
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 #383F79, 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 0.044
- Cobalt #1E488F ΔE 0.047
- Blueberry #464196 ΔE 0.053
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.064
- Marine Blue #01386A ΔE 0.067
Use #383F79 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.