#178190
Closest named color: Ocean (#017B92). oklch(55.5% 0.091 209.8), rgb(23, 129, 144).
Aa
White text reads best on this color (4.58:1).
About this color
#178190 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.091 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.021 away. White text reads best on it, at 4.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #178190 |
| RGB | rgb(23, 129, 144) |
| HSL | hsl(187, 72%, 33%) |
| OKLCH | oklch(55.5% 0.091 209.8) |
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 #178190 | 4.58:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #178190 | 4.57:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #178190 text on white | 4.58:1 | AA | Lc 71.4 | Content text, not long reading |
| #178190 text on black | 4.57:1 | AA | Lc -30.2 | 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
#F1F6F7
oklch(97% 0.005 211)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C9DEE1
oklch(88.6% 0.023 207.1)
-
Step 300
300
#A3C8CF
oklch(80.8% 0.041 210.4)
-
Step 400
400
#6FACB7
oklch(70.7% 0.065 210.1)
-
Step 500
500
#4397A5
oklch(63% 0.083 210)
-
Step 600
600 (this color)
#178190
oklch(55.5% 0.091 209.8)
-
Step 700
700
#026D7B
oklch(49% 0.084 210.3)
-
Step 800
800
#0D5964
oklch(42.7% 0.07 210.1)
-
Step 900
900
#164951
oklch(37.6% 0.054 209.7)
-
Step 950
950
#0F2B30
oklch(27% 0.035 210.9)
#178190 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) | #747C91 | 0.085 |
| Deuteranopia (no green cones) | #647090 | 0.078 |
| Tritanopia (no blue cones) | #008886 | 0.031 |
| Achromatopsia (no color) | #757575 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178190
#178190
oklch(55.5% 0.091 209.8)
- #A15E53
#A15E53
oklch(55.5% 0.09 30.1)
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 #178190, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.021
- Teal Blue #01889F ΔE 0.027
- Teal #008080 ΔE 0.027
- Dark Cyan #008B8B ΔE 0.034
- Deep Aqua #08787F ΔE 0.035
- Bluegreen #017A79 ΔE 0.039
- Cerulean #457B9D ΔE 0.043
- Sea Blue #047495 ΔE 0.044
Use #178190 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.