#383D77
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.097 277.1), rgb(56, 61, 119).
Aa
White text reads best on this color (9.99:1).
About this color
#383D77 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 0.043 away. White text reads best on it, at 9.99:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.99:1 |
Values
| HEX | #383D77 |
| RGB | rgb(56, 61, 119) |
| HSL | hsl(235, 36%, 34%) |
| OKLCH | oklch(38.6% 0.097 277.1) |
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 #383D77 | 9.99:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #383D77 | 2.10:1 | Fails | Lc 10.9 | Not readable |
| #383D77 text on white | 9.99:1 | AAA | Lc 93.0 | Preferred for body text |
| #383D77 text on black | 2.10:1 | Fails | Lc -9.4 | 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
#D2D7F5
oklch(88.5% 0.042 278)
-
Step 300
300
#B4BDF0
oklch(80.9% 0.073 276.8)
-
Step 400
400
#8E99E9
oklch(70.7% 0.117 277)
-
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
#404492
oklch(42.7% 0.126 277.4)
-
Step 900
900 (this color)
#383D77
oklch(38.6% 0.097 277.1)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#383D77 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) | #244579 | 0.031 |
| Deuteranopia (no green cones) | #1E4076 | 0.032 |
| Tritanopia (no blue cones) | #1E4A54 | 0.086 |
| Achromatopsia (no color) | #424242 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383D77
#383D77
oklch(38.6% 0.097 277.1)
- #504400
#504400
oklch(38.7% 0.08 97.7)
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 #383D77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Twilight Blue #0A437A ΔE 0.045
- Cobalt #1E488F ΔE 0.052
- Blueberry #464196 ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Marine Blue #01386A ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.064
- Dusk Blue #26538D ΔE 0.067
Use #383D77 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.