#00423E
Closest named color: Midnight Green (#073B4C). oklch(34.2% 0.059 188), rgb(0, 66, 62).
Aa
White text reads best on this color (11.35:1).
About this color
#00423E is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.059 and its hue 188°. 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 11.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.84:1 |
| White text | 11.35:1 |
Values
| HEX | #00423E |
| RGB | rgb(0, 66, 62) |
| HSL | hsl(176, 100%, 13%) |
| OKLCH | oklch(34.2% 0.059 188) |
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 #00423E | 11.35:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #00423E | 1.84:1 | Fails | Lc 8.1 | Not readable |
| #00423E text on white | 11.35:1 | AAA | Lc 95.8 | Preferred for body text |
| #00423E text on black | 1.84:1 | 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
#C8DFDC
oklch(88.6% 0.025 187.3)
-
Step 300
300
#A1CAC6
oklch(80.8% 0.044 189)
-
Step 400
400
#6AAFA9
oklch(70.7% 0.071 188.6)
-
Step 500
500
#399B94
oklch(63.1% 0.091 188.5)
-
Step 600
600
#00857E
oklch(55.6% 0.097 188.3)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900 (this color)
#00423E
oklch(34.2% 0.059 188)
-
Step 950
950
#0C2C2A
oklch(26.9% 0.037 189.5)
#00423E 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) | #3E3E3E | 0.063 |
| Deuteranopia (no green cones) | #35383F | 0.058 |
| Tritanopia (no blue cones) | #004441 | 0.008 |
| Achromatopsia (no color) | #3A3A3A | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00423E
#00423E
oklch(34.2% 0.059 188)
- #522B32
#522B32
oklch(34.2% 0.058 9.1)
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 #00423E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.040
- Dark Teal #014D4E ΔE 0.041
- Evergreen #05472A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.047
- Charcoal #264653 ΔE 0.050
- Dark Blue Green #005249 ΔE 0.054
- Onyx #343A40 ΔE 0.054
- Pine Green #0A481E ΔE 0.061
Use #00423E 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.