#043B52
Closest named color: Midnight Green (#073B4C). oklch(33.2% 0.066 232.9), rgb(4, 59, 82).
Aa
White text reads best on this color (11.98:1).
About this color
#043B52 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.066 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.011 away. White text reads best on it, at 11.98:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.75:1 |
| White text | 11.98:1 |
Values
| HEX | #043B52 |
| RGB | rgb(4, 59, 82) |
| HSL | hsl(198, 91%, 17%) |
| OKLCH | oklch(33.2% 0.066 232.9) |
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 #043B52 | 11.98:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #043B52 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #043B52 text on white | 11.98:1 | AAA | Lc 97.0 | Preferred for body text |
| #043B52 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A2C7DC
oklch(81% 0.049 233.1)
-
Step 400
400
#6DA9CA
oklch(70.6% 0.079 233.5)
-
Step 500
500
#4094BD
oklch(63.2% 0.101 232.8)
-
Step 600
600
#137DA9
oklch(55.6% 0.11 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#095675
oklch(42.7% 0.084 232.5)
-
Step 900
900 (this color)
#043B52
oklch(33.2% 0.066 232.9)
-
Step 950
950
#0E2A37
oklch(27% 0.041 231.2)
#043B52 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) | #2F3A53 | 0.041 |
| Deuteranopia (no green cones) | #253452 | 0.034 |
| Tritanopia (no blue cones) | #004143 | 0.039 |
| Achromatopsia (no color) | #373737 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043B52
#043B52
oklch(33.2% 0.066 232.9)
- #502B12
#502B12
oklch(33.2% 0.066 52.4)
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 #043B52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.011
- Dark Blue Grey #1F3B4D ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.029
- Gunmetal #293241 ΔE 0.045
- Marine Blue #01386A ΔE 0.046
- Charcoal #264653 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.052
- Marine #042E60 ΔE 0.053
Use #043B52 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.