#043940
Closest named color: Midnight Green (#073B4C). oklch(31.6% 0.052 208.8), rgb(4, 57, 64).
Aa
White text reads best on this color (12.61:1).
About this color
#043940 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.052 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.022 away. White text reads best on it, at 12.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.66:1 |
| White text | 12.61:1 |
Values
| HEX | #043940 |
| RGB | rgb(4, 57, 64) |
| HSL | hsl(187, 88%, 13%) |
| OKLCH | oklch(31.6% 0.052 208.8) |
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 #043940 | 12.61:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #043940 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #043940 text on white | 12.61:1 | AAA | Lc 98.3 | Preferred for body text |
| #043940 text on black | 1.66:1 | 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 950.
-
Step 50
50
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DDEDF0
oklch(93.5% 0.017 210.2)
-
Step 200
200
#C0E0E5
oklch(88.5% 0.034 208)
-
Step 300
300
#91CCD6
oklch(80.8% 0.062 209.1)
-
Step 400
400
#46B2C1
oklch(70.8% 0.099 207.9)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006D7A
oklch(49% 0.084 209.1)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950 (this color)
#043940
oklch(31.6% 0.052 208.8)
#043940 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) | #333640 | 0.050 |
| Deuteranopia (no green cones) | #2B3140 | 0.045 |
| Tritanopia (no blue cones) | #003C3B | 0.016 |
| Achromatopsia (no color) | #333333 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043940
#043940
oklch(31.6% 0.052 208.8)
- #492722
#492722
oklch(31.6% 0.052 29.2)
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 #043940, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.034
- Gunmetal #293241 ΔE 0.041
- Onyx #343A40 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.055
- Charcoal #264653 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.064
Use #043940 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.