#009178
Closest named color: Viridian (#1E9167). oklch(58.6% 0.111 174.8), rgb(0, 145, 120).
Aa
Black text reads best on this color (5.32:1).
About this color
#009178 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.111 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.025 away. Black text reads best on it, at 5.32:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #009178 |
| RGB | rgb(0, 145, 120) |
| HSL | hsl(170, 100%, 28%) |
| OKLCH | oklch(58.6% 0.111 174.8) |
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 #009178 | 3.94:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #009178 | 5.32:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #009178 text on white | 3.94:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #009178 text on black | 5.32:1 | AA | Lc -35.4 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C7DFD8
oklch(88.4% 0.027 176.3)
-
Step 300
300
#A0CCBE
oklch(81% 0.05 173.6)
-
Step 400
400
#68B19D
oklch(70.7% 0.08 174.4)
-
Step 500
500
#349D86
oklch(63% 0.101 175.3)
-
Step 600
600 (this color)
#009178
oklch(58.6% 0.111 174.8)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#0B4D3F
oklch(37.7% 0.067 174.2)
-
Step 950
950
#0B2D25
oklch(27% 0.042 174.6)
#009178 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) | #8B8777 | 0.115 |
| Deuteranopia (no green cones) | #7C7B7A | 0.111 |
| Tritanopia (no blue cones) | #00938A | 0.027 |
| Achromatopsia (no color) | #808080 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #009178
#009178
oklch(58.6% 0.111 174.8)
- #AF5E80
#AF5E80
oklch(58.6% 0.112 354.5)
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 #009178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.025
- Ocean Green #3D9973 ΔE 0.038
- Blue Green #0F9B8E ΔE 0.039
- Dark Cyan #008B8B ΔE 0.039
- Sea Green #2E8B57 ΔE 0.044
- Dusty Teal #4C9085 ΔE 0.045
- Teal Green #0A9396 ΔE 0.046
- Persian Green #2A9D8F ΔE 0.048
Use #009178 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.