#383E79
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.099 276.4), rgb(56, 62, 121).
Aa
White text reads best on this color (9.84:1).
About this color
#383E79 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.099 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 9.84:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.84:1 |
Values
| HEX | #383E79 |
| RGB | rgb(56, 62, 121) |
| HSL | hsl(234, 37%, 35%) |
| OKLCH | oklch(39% 0.099 276.4) |
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 #383E79 | 9.84:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #383E79 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #383E79 text on white | 9.84:1 | AAA | Lc 92.7 | Preferred for body text |
| #383E79 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D1D7F5
oklch(88.4% 0.042 276.6)
-
Step 300
300
#B3BDF1
oklch(80.9% 0.074 276.1)
-
Step 400
400
#8D99EA
oklch(70.6% 0.119 276.5)
-
Step 500
500
#737EE4
oklch(63.2% 0.152 276.5)
-
Step 600
600
#5D65D1
oklch(55.6% 0.164 276.5)
-
Step 700
700
#4D53B5
oklch(49.1% 0.153 276.6)
-
Step 800
800
#3F4493
oklch(42.7% 0.128 276.8)
-
Step 900
900 (this color)
#383E79
oklch(39% 0.099 276.4)
-
Step 950
950
#1F2345
oklch(27.1% 0.063 276.3)
#383E79 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) | #24467B | 0.031 |
| Deuteranopia (no green cones) | #1D4178 | 0.033 |
| Tritanopia (no blue cones) | #1C4B55 | 0.088 |
| Achromatopsia (no color) | #434343 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383E79
#383E79
oklch(39% 0.099 276.4)
- #524400
#524400
oklch(39% 0.08 95.7)
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 #383E79, 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 0.048
- Blueberry #464196 ΔE 0.054
- Light Navy #155084 ΔE 0.057
- Dusk Blue #26538D ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.065
- Marine Blue #01386A ΔE 0.066
Use #383E79 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.