#043F4B
Closest named color: Midnight Green (#073B4C). oklch(33.9% 0.058 216.1), rgb(4, 63, 75).
Aa
White text reads best on this color (11.55:1).
About this color
#043F4B is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.058 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.014 away. White text reads best on it, at 11.55:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.81:1 |
| White text | 11.55:1 |
Values
| HEX | #043F4B |
| RGB | rgb(4, 63, 75) |
| HSL | hsl(190, 90%, 15%) |
| OKLCH | oklch(33.9% 0.058 216.1) |
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 #043F4B | 11.55:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #043F4B | 1.81:1 | Fails | Lc 7.7 | Not readable |
| #043F4B text on white | 11.55:1 | AAA | Lc 96.2 | Preferred for body text |
| #043F4B text on black | 1.81:1 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6CACBD
oklch(70.8% 0.07 216.5)
-
Step 500
500
#3E97AC
oklch(63.1% 0.089 216)
-
Step 600
600
#098198
oklch(55.7% 0.097 216.4)
-
Step 700
700
#006C80
oklch(49% 0.087 216.4)
-
Step 800
800
#035969
oklch(42.8% 0.075 215.6)
-
Step 900
900 (this color)
#043F4B
oklch(33.9% 0.058 216.1)
-
Step 950
950
#0E2B32
oklch(27.1% 0.037 216.1)
#043F4B 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) | #373D4C | 0.051 |
| Deuteranopia (no green cones) | #2E364B | 0.046 |
| Tritanopia (no blue cones) | #004343 | 0.023 |
| Achromatopsia (no color) | #393939 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #043F4B
#043F4B
oklch(33.9% 0.058 216.1)
- #522C22
#522C22
oklch(34% 0.059 35.6)
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 #043F4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.014
- Dark Blue Grey #1F3B4D ΔE 0.023
- Charcoal #264653 ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.047
- Dark Teal #014D4E ΔE 0.047
- Onyx #343A40 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.048
- Gunmetal #293241 ΔE 0.049
Use #043F4B 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.