#384378
Closest named color: Twilight Blue (#0A437A). oklch(40% 0.09 272.9), rgb(56, 67, 120).
Aa
White text reads best on this color (9.36:1).
About this color
#384378 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.090 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.044 away. White text reads best on it, at 9.36:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.36:1 |
Values
| HEX | #384378 |
| RGB | rgb(56, 67, 120) |
| HSL | hsl(230, 36%, 35%) |
| OKLCH | oklch(40% 0.09 272.9) |
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 #384378 | 9.36:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #384378 | 2.24:1 | Fails | Lc 12.5 | Not readable |
| #384378 text on white | 9.36:1 | AAA | Lc 91.5 | Preferred for body text |
| #384378 text on black | 2.24:1 | Fails | Lc -10.9 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B2BEED
oklch(80.8% 0.068 273.6)
-
Step 400
400
#8A9CE4
oklch(70.7% 0.108 272.7)
-
Step 500
500
#6E81DC
oklch(63% 0.138 272.9)
-
Step 600
600
#5869CA
oklch(55.6% 0.15 273.1)
-
Step 700
700
#4857AF
oklch(49.1% 0.14 272.9)
-
Step 800
800
#3B488D
oklch(42.8% 0.114 272.7)
-
Step 900
900 (this color)
#384378
oklch(40% 0.09 272.9)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#384378 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) | #2D497A | 0.020 |
| Deuteranopia (no green cones) | #274477 | 0.021 |
| Tritanopia (no blue cones) | #1C4E57 | 0.080 |
| Achromatopsia (no color) | #464646 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #384378
#384378
oklch(40% 0.09 272.9)
- #574600
#574600
oklch(40% 0.082 93)
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 #384378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.045
- Cobalt #1E488F ΔE 0.046
- Light Navy #155084 ΔE 0.047
- Dusk Blue #26538D ΔE 0.053
- Blueberry #464196 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.058
Use #384378 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.