#383B67
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.075 279.1), rgb(56, 59, 103).
Aa
White text reads best on this color (10.55:1).
About this color
#383B67 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.075 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.048 away. White text reads best on it, at 10.55:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.55:1 |
Values
| HEX | #383B67 |
| RGB | rgb(56, 59, 103) |
| HSL | hsl(236, 30%, 31%) |
| OKLCH | oklch(37.1% 0.075 279.1) |
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 #383B67 | 10.55:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #383B67 | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #383B67 text on white | 10.55:1 | AAA | Lc 94.4 | Preferred for body text |
| #383B67 text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D7EE
oklch(88.4% 0.032 279.8)
-
Step 300
300
#B8BDE5
oklch(80.8% 0.057 279.5)
-
Step 400
400
#949BD8
oklch(70.7% 0.089 278.8)
-
Step 500
500
#7B81CE
oklch(63.1% 0.115 279.1)
-
Step 600
600
#6569BB
oklch(55.6% 0.126 279.4)
-
Step 700
700
#5457A1
oklch(49.1% 0.117 279.4)
-
Step 800
800
#444882
oklch(42.7% 0.095 278.6)
-
Step 900
900 (this color)
#383B67
oklch(37.1% 0.075 279.1)
-
Step 950
950
#22243D
oklch(27.1% 0.046 279.3)
#383B67 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) | #2B4169 | 0.023 |
| Deuteranopia (no green cones) | #283D66 | 0.023 |
| Tritanopia (no blue cones) | #29444C | 0.065 |
| Achromatopsia (no color) | #3F3F3F | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383B67
#383B67
oklch(37.1% 0.075 279.1)
- #4A4003
#4A4003
oklch(37.1% 0.075 98.9)
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 #383B67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.054
- Marine Blue #01386A ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.060
- Charcoal #264653 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.067
- Onyx #343A40 ΔE 0.069
Use #383B67 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.