#178A94
Closest named color: Dark Cyan (#008B8B). oklch(58% 0.094 204.3), rgb(23, 138, 148).
Aa
Black text reads best on this color (5.09:1).
About this color
#178A94 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.094 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.017 away. Black text reads best on it, at 5.09:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #178A94 |
| RGB | rgb(23, 138, 148) |
| HSL | hsl(185, 73%, 34%) |
| OKLCH | oklch(58% 0.094 204.3) |
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 #178A94 | 4.11:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #178A94 | 5.09:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #178A94 text on white | 4.11:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #178A94 text on black | 5.09:1 | AA | Lc -33.8 | 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
#6BADB4
oklch(70.6% 0.068 204.4)
-
Step 500
500
#3D99A2
oklch(63.2% 0.087 204.2)
-
Step 600
600 (this color)
#178A94
oklch(58% 0.094 204.3)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800
#015A61
oklch(42.6% 0.072 204)
-
Step 900
900
#124A4F
oklch(37.6% 0.056 203.8)
-
Step 950
950
#0D2B2F
oklch(26.9% 0.036 207.2)
#178A94 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) | #7E8495 | 0.093 |
| Deuteranopia (no green cones) | #6D7894 | 0.085 |
| Tritanopia (no blue cones) | #00908D | 0.024 |
| Achromatopsia (no color) | #7D7D7D | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178A94
#178A94
oklch(58% 0.094 204.3)
- #AB635E
#AB635E
oklch(58% 0.094 24.6)
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 #178A94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.017
- Teal Blue #01889F ΔE 0.020
- Teal Green #0A9396 ΔE 0.026
- Teal #008080 ΔE 0.040
- Dusty Teal #4C9085 ΔE 0.047
- Ocean #017B92 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.047
- Sea #3C9992 ΔE 0.053
Use #178A94 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.