#178D97
Closest named color: Teal Green (#0A9396). oklch(58.9% 0.096 204.1), rgb(23, 141, 151).
Aa
Black text reads best on this color (5.29:1).
About this color
#178D97 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.096 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Green (#0A9396), ΔE 0.019 away. Black text reads best on it, at 5.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Teal Green (#0A9396) |
| Black text | 5.29:1 |
| White text | 3.96:1 |
Values
| HEX | #178D97 |
| RGB | rgb(23, 141, 151) |
| HSL | hsl(185, 74%, 34%) |
| OKLCH | oklch(58.9% 0.096 204.1) |
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 #178D97 | 3.96:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #178D97 | 5.29:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #178D97 text on white | 3.96:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #178D97 text on black | 5.29:1 | AA | Lc -35.1 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE0
oklch(88.5% 0.024 203.4)
-
Step 300
300
#A1C9CD
oklch(80.8% 0.043 203.9)
-
Step 400
400
#6AADB4
oklch(70.6% 0.069 204.2)
-
Step 500
500
#3A99A2
oklch(63.1% 0.088 204)
-
Step 600
600 (this color)
#178D97
oklch(58.9% 0.096 204.1)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#104A50
oklch(37.6% 0.058 205.3)
-
Step 950
950
#0D2C2F
oklch(27.2% 0.036 204)
#178D97 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) | #818798 | 0.095 |
| Deuteranopia (no green cones) | #707A97 | 0.088 |
| Tritanopia (no blue cones) | #009390 | 0.024 |
| Achromatopsia (no color) | #808080 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178D97
#178D97
oklch(58.9% 0.096 204.1)
- #AF6561
#AF6561
oklch(58.9% 0.096 23.7)
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 #178D97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Green #0A9396 ΔE 0.019
- Dark Cyan #008B8B ΔE 0.020
- Teal Blue #01889F ΔE 0.023
- Dusty Teal #4C9085 ΔE 0.043
- Sea #3C9992 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.046
- Teal #008080 ΔE 0.048
- Blue Green #0F9B8E ΔE 0.049
Use #178D97 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.