#043156
Closest named color: Marine (#042E60). oklch(30.7% 0.081 249.2), rgb(4, 49, 86).
Aa
White text reads best on this color (13.30:1).
About this color
#043156 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.081 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.021 away. White text reads best on it, at 13.30:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.57:1 |
| White text | 13.30:1 |
Values
| HEX | #043156 |
| RGB | rgb(4, 49, 86) |
| HSL | hsl(207, 91%, 18%) |
| OKLCH | oklch(30.7% 0.081 249.2) |
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 #043156 | 13.30:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #043156 | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #043156 text on white | 13.30:1 | AAA | Lc 99.3 | Preferred for body text |
| #043156 text on black | 1.57:1 | 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 950.
-
Step 50
50
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFC
oklch(93.6% 0.028 248.1)
-
Step 200
200
#BFDDFC
oklch(88.6% 0.054 249.3)
-
Step 300
300
#90C6FC
oklch(80.9% 0.095 249.1)
-
Step 400
400
#49A6FB
oklch(70.8% 0.153 249.1)
-
Step 500
500
#008DED
oklch(63.1% 0.175 249.1)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950 (this color)
#043156
oklch(30.7% 0.081 249.2)
#043156 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) | #1F3357 | 0.026 |
| Deuteranopia (no green cones) | #112C55 | 0.016 |
| Tritanopia (no blue cones) | #003A3F | 0.058 |
| Achromatopsia (no color) | #2F2F2F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043156
#043156
oklch(30.7% 0.081 249.2)
- #452800
#452800
oklch(30.7% 0.067 68.6)
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 #043156, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.027
- Marine Blue #01386A ΔE 0.039
- Midnight Green #073B4C ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.052
- Gunmetal #293241 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.056
Use #043156 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.