#03403B
Closest named color: Midnight Green (#073B4C). oklch(33.5% 0.057 186), rgb(3, 64, 59).
Aa
White text reads best on this color (11.66:1).
About this color
#03403B is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.057 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.040 away. White text reads best on it, at 11.66:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.80:1 |
| White text | 11.66:1 |
Values
| HEX | #03403B |
| RGB | rgb(3, 64, 59) |
| HSL | hsl(175, 91%, 13%) |
| OKLCH | oklch(33.5% 0.057 186) |
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 #03403B | 11.66:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #03403B | 1.80:1 | Fails | Lc 7.5 | Not readable |
| #03403B text on white | 11.66:1 | AAA | Lc 96.4 | Preferred for body text |
| #03403B text on black | 1.80:1 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C9DFDB
oklch(88.6% 0.024 183.7)
-
Step 300
300
#A2CAC5
oklch(80.9% 0.043 187)
-
Step 400
400
#6DAFA7
oklch(70.7% 0.069 186)
-
Step 500
500
#3F9B91
oklch(63.2% 0.088 185.4)
-
Step 600
600
#0B857C
oklch(55.6% 0.095 186.4)
-
Step 700
700
#007068
oklch(49.1% 0.086 186.2)
-
Step 800
800
#055C55
oklch(42.8% 0.074 185.8)
-
Step 900
900 (this color)
#03403B
oklch(33.5% 0.057 186)
-
Step 950
950
#0E2C29
oklch(26.9% 0.036 186.4)
#03403B 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) | #3C3C3B | 0.061 |
| Deuteranopia (no green cones) | #34363C | 0.057 |
| Tritanopia (no blue cones) | #00423E | 0.007 |
| Achromatopsia (no color) | #383838 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03403B
#03403B
oklch(33.5% 0.057 186)
- #4F2932
#4F2932
oklch(33.4% 0.058 5.5)
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 #03403B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.040
- Evergreen #05472A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.047
- Dark Teal #014D4E ΔE 0.048
- Onyx #343A40 ΔE 0.053
- Charcoal #264653 ΔE 0.055
- Pakistan Green #283618 ΔE 0.057
- Dark Blue Green #005249 ΔE 0.060
Use #03403B 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.