#043F52
Closest named color: Midnight Green (#073B4C). oklch(34.3% 0.064 226.4), rgb(4, 63, 82).
Aa
White text reads best on this color (11.42:1).
About this color
#043F52 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.064 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.015 away. White text reads best on it, at 11.42:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.83:1 |
| White text | 11.42:1 |
Values
| HEX | #043F52 |
| RGB | rgb(4, 63, 82) |
| HSL | hsl(195, 91%, 17%) |
| OKLCH | oklch(34.3% 0.064 226.4) |
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 #043F52 | 11.42:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #043F52 | 1.83:1 | Fails | Lc 8.0 | Not readable |
| #043F52 text on white | 11.42:1 | AAA | Lc 95.9 | Preferred for body text |
| #043F52 text on black | 1.83:1 | 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
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE7
oklch(88.5% 0.026 227.9)
-
Step 300
300
#A1C8D9
oklch(81% 0.048 226.3)
-
Step 400
400
#6AABC5
oklch(70.7% 0.076 225.5)
-
Step 500
500
#3C95B7
oklch(63.1% 0.098 226.8)
-
Step 600
600
#037FA3
oklch(55.6% 0.106 226.6)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#015771
oklch(42.6% 0.082 226.7)
-
Step 900
900 (this color)
#043F52
oklch(34.3% 0.064 226.4)
-
Step 950
950
#0D2A36
oklch(26.9% 0.041 228.4)
#043F52 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) | #353E53 | 0.047 |
| Deuteranopia (no green cones) | #2B3752 | 0.040 |
| Tritanopia (no blue cones) | #004445 | 0.033 |
| Achromatopsia (no color) | #3A3A3A | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043F52
#043F52
oklch(34.3% 0.064 226.4)
- #532D1A
#532D1A
oklch(34.2% 0.064 46.4)
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 #043F52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.015
- Dark Blue Grey #1F3B4D ΔE 0.021
- Charcoal #264653 ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.043
- Dark Teal #014D4E ΔE 0.050
- Gunmetal #293241 ΔE 0.051
- Onyx #343A40 ΔE 0.052
Use #043F52 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.