#178A80
Closest named color: Dark Cyan (#008B8B). oklch(57.2% 0.096 185.6), rgb(23, 138, 128).
Aa
Black text reads best on this color (4.98:1).
About this color
#178A80 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.096 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.016 away. Black text reads best on it, at 4.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #178A80 |
| RGB | rgb(23, 138, 128) |
| HSL | hsl(175, 71%, 32%) |
| OKLCH | oklch(57.2% 0.096 185.6) |
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 #178A80 | 4.21:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #178A80 | 4.98:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #178A80 text on white | 4.21:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #178A80 text on black | 4.98:1 | AA | Lc -33.0 | 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
#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
#A2CAC4
oklch(80.8% 0.043 185.2)
-
Step 400
400
#6DAFA7
oklch(70.7% 0.069 186)
-
Step 500
500
#3F9B91
oklch(63.2% 0.088 185.4)
-
Step 600
600 (this color)
#178A80
oklch(57.2% 0.096 185.6)
-
Step 700
700
#007068
oklch(49.1% 0.086 186.2)
-
Step 800
800
#045C55
oklch(42.8% 0.074 185.8)
-
Step 900
900
#144B46
oklch(37.6% 0.057 186.4)
-
Step 950
950
#0E2C29
oklch(26.9% 0.036 186.4)
#178A80 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) | #828280 | 0.101 |
| Deuteranopia (no green cones) | #737781 | 0.095 |
| Tritanopia (no blue cones) | #008D87 | 0.012 |
| Achromatopsia (no color) | #7B7B7B | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178A80
#178A80
oklch(57.2% 0.096 185.6)
- #A75F70
#A75F70
oklch(57.2% 0.095 5.4)
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 #178A80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.016
- Teal #008080 ΔE 0.033
- Teal Green #0A9396 ΔE 0.037
- Dusty Teal #4C9085 ΔE 0.041
- Viridian #1E9167 ΔE 0.049
- Bluegreen #017A79 ΔE 0.050
- Blue Green #0F9B8E ΔE 0.050
- Teal Blue #01889F ΔE 0.051
Use #178A80 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.