#043768
Closest named color: Marine Blue (#01386A). oklch(33.6% 0.099 253), rgb(4, 55, 104).
Aa
White text reads best on this color (11.98:1).
About this color
#043768 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.099 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.004 away. White text reads best on it, at 11.98:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.98:1 |
Values
| HEX | #043768 |
| RGB | rgb(4, 55, 104) |
| HSL | hsl(209, 93%, 21%) |
| OKLCH | oklch(33.6% 0.099 253) |
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 #043768 | 11.98:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #043768 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #043768 text on white | 11.98:1 | AAA | Lc 96.9 | Preferred for body text |
| #043768 text on black | 1.75:1 | Fails | Lc 0.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DBF4
oklch(88.4% 0.041 252.8)
-
Step 300
300
#9FC4F0
oklch(80.9% 0.074 253.1)
-
Step 400
400
#69A4E9
oklch(70.7% 0.119 253.2)
-
Step 500
500
#3C8BE2
oklch(63% 0.152 253.2)
-
Step 600
600
#0E73D0
oklch(55.5% 0.166 253.1)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#064F92
oklch(42.7% 0.128 253)
-
Step 900
900 (this color)
#043768
oklch(33.6% 0.099 253)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#043768 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) | #1D3B6A | 0.024 |
| Deuteranopia (no green cones) | #063367 | 0.012 |
| Tritanopia (no blue cones) | #00434A | 0.074 |
| Achromatopsia (no color) | #373737 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043768
#043768
oklch(33.6% 0.099 253)
- #4D3000
#4D3000
oklch(33.6% 0.072 72.9)
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 #043768, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.004
- Marine #042E60 ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.046
- Midnight Green #073B4C ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.068
- Gunmetal #293241 ΔE 0.073
Use #043768 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.