#383E56
Closest named color: Dark Grey Blue (#29465B). oklch(36.9% 0.042 273.3), rgb(56, 62, 86).
Aa
White text reads best on this color (10.54:1).
About this color
#383E56 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.042 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #383E56 |
| RGB | rgb(56, 62, 86) |
| HSL | hsl(228, 21%, 28%) |
| OKLCH | oklch(36.9% 0.042 273.3) |
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 #383E56 | 10.54:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #383E56 | 1.99:1 | Fails | Lc 9.5 | Not readable |
| #383E56 text on white | 10.54:1 | AAA | Lc 94.5 | Preferred for body text |
| #383E56 text on black | 1.99:1 | Fails | Lc -8.1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAF0
oklch(93.7% 0.008 271.3)
-
Step 200
200
#D5D9E5
oklch(88.6% 0.017 271.2)
-
Step 300
300
#BAC0D6
oklch(81% 0.032 273.6)
-
Step 400
400
#969FC1
oklch(70.7% 0.051 273.4)
-
Step 500
500
#7C87B1
oklch(63% 0.065 273)
-
Step 600
600
#66719D
oklch(55.7% 0.07 273.1)
-
Step 700
700
#545E86
oklch(49% 0.066 273)
-
Step 800
800
#454D6D
oklch(42.7% 0.054 273.1)
-
Step 900
900 (this color)
#383E56
oklch(36.9% 0.042 273.3)
-
Step 950
950
#222634
oklch(27.1% 0.027 272.1)
#383E56 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) | #374057 | 0.006 |
| Deuteranopia (no green cones) | #343E55 | 0.007 |
| Tritanopia (no blue cones) | #304346 | 0.039 |
| Achromatopsia (no color) | #3F3F3F | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #383E56
#383E56
oklch(36.9% 0.042 273.3)
- #473F25
#473F25
oklch(36.9% 0.042 92.9)
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 #383E56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.035
- Onyx #343A40 ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.051
- Gunmetal #293241 ΔE 0.055
- Midnight Green #073B4C ΔE 0.059
Use #383E56 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.