#043B60
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.083 245.4), rgb(4, 59, 96).
Aa
White text reads best on this color (11.66:1).
About this color
#043B60 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.083 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.021 away. White text reads best on it, at 11.66:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.66:1 |
Values
| HEX | #043B60 |
| RGB | rgb(4, 59, 96) |
| HSL | hsl(204, 92%, 20%) |
| OKLCH | oklch(34.1% 0.083 245.4) |
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 #043B60 | 11.66:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #043B60 | 1.79:1 | Fails | Lc 7.5 | Not readable |
| #043B60 text on white | 11.66:1 | AAA | Lc 96.4 | Preferred for body text |
| #043B60 text on black | 1.79:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF5
oklch(93.5% 0.018 245.4)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A0C5E7
oklch(80.8% 0.062 246.4)
-
Step 400
400
#69A7DB
oklch(70.7% 0.1 245.2)
-
Step 500
500
#3B90D1
oklch(63.1% 0.127 245.1)
-
Step 600
600
#0879BE
oklch(55.7% 0.138 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#035385
oklch(42.8% 0.107 245.2)
-
Step 900
900 (this color)
#043B60
oklch(34.1% 0.083 245.4)
-
Step 950
950
#0D293E
oklch(27.1% 0.052 244.2)
#043B60 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) | #293D62 | 0.034 |
| Deuteranopia (no green cones) | #1C355F | 0.023 |
| Tritanopia (no blue cones) | #004449 | 0.057 |
| Achromatopsia (no color) | #383838 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043B60
#043B60
oklch(34.1% 0.083 245.4)
- #522E00
#522E00
oklch(33.9% 0.076 65.1)
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 #043B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.026
- Midnight Green #073B4C ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.038
- Marine #042E60 ΔE 0.041
- Twilight Blue #0A437A ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.052
- Charcoal #264653 ΔE 0.056
Use #043B60 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.