#043F60
Closest named color: Marine Blue (#01386A). oklch(35.2% 0.079 241), rgb(4, 63, 96).
Aa
White text reads best on this color (11.14:1).
About this color
#043F60 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.079 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.031 away. White text reads best on it, at 11.14:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.88:1 |
| White text | 11.14:1 |
Values
| HEX | #043F60 |
| RGB | rgb(4, 63, 96) |
| HSL | hsl(202, 92%, 20%) |
| OKLCH | oklch(35.2% 0.079 241) |
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 #043F60 | 11.14:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #043F60 | 1.88:1 | Fails | Lc 8.6 | Not readable |
| #043F60 text on white | 11.14:1 | AAA | Lc 95.3 | Preferred for body text |
| #043F60 text on black | 1.88:1 | Fails | Lc -7.3 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DDED
oklch(88.6% 0.032 239.4)
-
Step 300
300
#9FC6E4
oklch(80.9% 0.06 241.6)
-
Step 400
400
#67A8D6
oklch(70.6% 0.095 240.8)
-
Step 500
500
#3792CC
oklch(63.2% 0.122 240.8)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900 (this color)
#043F60
oklch(35.2% 0.079 241)
-
Step 950
950
#0C293D
oklch(27% 0.051 242.2)
#043F60 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) | #2F4061 | 0.038 |
| Deuteranopia (no green cones) | #23385F | 0.029 |
| Tritanopia (no blue cones) | #00474B | 0.052 |
| Achromatopsia (no color) | #3B3B3B | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043F60
#043F60
oklch(35.2% 0.079 241)
- #582F03
#582F03
oklch(35.1% 0.08 60.3)
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 #043F60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.035
- Midnight Green #073B4C ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.041
- Charcoal #264653 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.046
- Marine #042E60 ΔE 0.054
Use #043F60 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.