#178898
Closest named color: Teal Blue (#01889F). oklch(57.6% 0.095 210), rgb(23, 136, 152).
Aa
Black text reads best on this color (5.01:1).
About this color
#178898 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.095 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.011 away. Black text reads best on it, at 5.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #178898 |
| RGB | rgb(23, 136, 152) |
| HSL | hsl(187, 74%, 34%) |
| OKLCH | oklch(57.6% 0.095 210) |
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 #178898 | 4.19:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #178898 | 5.01:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #178898 text on white | 4.19:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #178898 text on black | 5.01:1 | AA | Lc -33.2 | 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
#C8DEE2
oklch(88.5% 0.024 209.8)
-
Step 300
300
#A2C9D0
oklch(81% 0.042 209.7)
-
Step 400
400
#6CADB8
oklch(70.8% 0.068 209.3)
-
Step 500
500
#3D98A7
oklch(63.2% 0.088 210.1)
-
Step 600
600 (this color)
#178898
oklch(57.6% 0.095 210)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#035965
oklch(42.6% 0.073 210.7)
-
Step 900
900
#134A52
oklch(37.8% 0.057 209)
-
Step 950
950
#0E2B30
oklch(27% 0.036 210.5)
#178898 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) | #7A8399 | 0.089 |
| Deuteranopia (no green cones) | #6A7798 | 0.081 |
| Tritanopia (no blue cones) | #008F8D | 0.032 |
| Achromatopsia (no color) | #7C7C7C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178898
#178898
oklch(57.6% 0.095 210)
- #AA6357
#AA6357
oklch(57.7% 0.095 30.4)
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 #178898, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.011
- Dark Cyan #008B8B ΔE 0.026
- Teal Green #0A9396 ΔE 0.034
- Blue NCS #118AB2 ΔE 0.040
- Ocean #017B92 ΔE 0.040
- Teal #008080 ΔE 0.041
- Cerulean #457B9D ΔE 0.048
- Stormy Blue #507B9C ΔE 0.053
Use #178898 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.