#178798
Closest named color: Teal Blue (#01889F). oklch(57.4% 0.095 211), rgb(23, 135, 152).
Aa
Black text reads best on this color (4.95:1).
About this color
#178798 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.095 and its hue 211°. 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 4.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.95:1 |
| White text | 4.23:1 |
Values
| HEX | #178798 |
| RGB | rgb(23, 135, 152) |
| HSL | hsl(188, 74%, 34%) |
| OKLCH | oklch(57.4% 0.095 211) |
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 #178798 | 4.23:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #178798 | 4.95:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #178798 text on white | 4.23:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #178798 text on black | 4.95:1 | AA | Lc -32.8 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
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
#6CACB9
oklch(70.6% 0.068 211.9)
-
Step 500
500
#3E98A7
oklch(63.2% 0.087 210.2)
-
Step 600
600 (this color)
#178798
oklch(57.4% 0.095 211)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#045966
oklch(42.6% 0.073 212)
-
Step 900
900
#134A53
oklch(37.8% 0.057 210.7)
-
Step 950
950
#0E2B30
oklch(27% 0.036 210.5)
#178798 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) | #798299 | 0.088 |
| Deuteranopia (no green cones) | #697698 | 0.080 |
| Tritanopia (no blue cones) | #008E8C | 0.033 |
| Achromatopsia (no color) | #7B7B7B | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178798
#178798
oklch(57.4% 0.095 211)
- #A96256
#A96256
oklch(57.3% 0.095 30.5)
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 #178798, 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 0.028
- Ocean #017B92 ΔE 0.037
- Teal Green #0A9396 ΔE 0.037
- Blue NCS #118AB2 ΔE 0.040
- Teal #008080 ΔE 0.040
- Cerulean #457B9D ΔE 0.046
- Stormy Blue #507B9C ΔE 0.051
Use #178798 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.