#043C56
Closest named color: Midnight Green (#073B4C). oklch(33.7% 0.07 235.8), rgb(4, 60, 86).
Aa
White text reads best on this color (11.75:1).
About this color
#043C56 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.070 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.018 away. White text reads best on it, at 11.75:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.78:1 |
| White text | 11.75:1 |
Values
| HEX | #043C56 |
| RGB | rgb(4, 60, 86) |
| HSL | hsl(199, 91%, 18%) |
| OKLCH | oklch(33.7% 0.07 235.8) |
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 #043C56 | 11.75:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #043C56 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #043C56 text on white | 11.75:1 | AAA | Lc 96.6 | Preferred for body text |
| #043C56 text on black | 1.78:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DDEA
oklch(88.6% 0.029 234.9)
-
Step 300
300
#A1C7DE
oklch(81% 0.052 234.9)
-
Step 400
400
#6BA9CE
oklch(70.7% 0.084 235.9)
-
Step 500
500
#3E93C1
oklch(63.1% 0.107 235.7)
-
Step 600
600
#0D7CAE
oklch(55.5% 0.117 236.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#055679
oklch(42.8% 0.089 235.3)
-
Step 900
900 (this color)
#043C56
oklch(33.7% 0.07 235.8)
-
Step 950
950
#0E2A39
oklch(27.1% 0.044 235)
#043C56 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) | #2F3C57 | 0.040 |
| Deuteranopia (no green cones) | #253556 | 0.033 |
| Tritanopia (no blue cones) | #004345 | 0.044 |
| Achromatopsia (no color) | #383838 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043C56
#043C56
oklch(33.7% 0.07 235.8)
- #522C0E
#522C0E
oklch(33.7% 0.07 55.3)
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 #043C56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.018
- Dark Blue Grey #1F3B4D ΔE 0.023
- Prussian Blue #1D3557 ΔE 0.027
- Marine Blue #01386A ΔE 0.040
- Charcoal #264653 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Gunmetal #293241 ΔE 0.049
- Marine #042E60 ΔE 0.052
Use #043C56 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.