#00423A
Closest named color: Evergreen (#05472A). oklch(34% 0.061 181.5), rgb(0, 66, 58).
Aa
White text reads best on this color (11.41:1).
About this color
#00423A is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.061 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Evergreen (#05472A), ΔE 0.036 away. White text reads best on it, at 11.41:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Evergreen (#05472A) |
| Black text | 1.84:1 |
| White text | 11.41:1 |
Values
| HEX | #00423A |
| RGB | rgb(0, 66, 58) |
| HSL | hsl(173, 100%, 13%) |
| OKLCH | oklch(34% 0.061 181.5) |
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 #00423A | 11.41:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #00423A | 1.84:1 | Fails | Lc 8.0 | Not readable |
| #00423A text on white | 11.41:1 | AAA | Lc 95.9 | Preferred for body text |
| #00423A 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
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C8DFDA
oklch(88.5% 0.025 181.2)
-
Step 300
300
#A1CBC2
oklch(80.9% 0.046 180.5)
-
Step 400
400
#6AB0A4
oklch(70.7% 0.073 182)
-
Step 500
500
#399C8D
oklch(63.1% 0.094 181.3)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900 (this color)
#00423A
oklch(34% 0.061 181.5)
-
Step 950
950
#0C2D28
oklch(27.1% 0.039 181.6)
#00423A 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) | #3E3D3A | 0.064 |
| Deuteranopia (no green cones) | #36373B | 0.062 |
| Tritanopia (no blue cones) | #004340 | 0.010 |
| Achromatopsia (no color) | #3A3A3A | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00423A
#00423A
oklch(34% 0.061 181.5)
- #522A36
#522A36
oklch(34.2% 0.061 1.6)
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 #00423A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Evergreen #05472A ΔE 0.036
- Dark Teal #014D4E ΔE 0.044
- Midnight Green #073B4C ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.053
- Pine Green #0A481E ΔE 0.054
- Dark Blue Green #005249 ΔE 0.054
- Charcoal #264653 ΔE 0.056
- Onyx #343A40 ΔE 0.057
Use #00423A 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.