#166F80
Closest named color: Deep Turquoise (#017374). oklch(50% 0.082 214.3), rgb(22, 111, 128).
Aa
White text reads best on this color (5.80:1).
About this color
#166F80 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.082 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.027 away. White text reads best on it, at 5.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #166F80 |
| RGB | rgb(22, 111, 128) |
| HSL | hsl(190, 71%, 29%) |
| OKLCH | oklch(50% 0.082 214.3) |
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 #166F80 | 5.80:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #166F80 | 3.61:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #166F80 text on white | 5.80:1 | AA | Lc 78.6 | Fine for body text |
| #166F80 text on black | 3.61:1 | AA large text | Lc -23.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A4C8D0
oklch(80.9% 0.04 212.7)
-
Step 400
400
#71ABB9
oklch(70.6% 0.064 214.6)
-
Step 500
500
#4796A8
oklch(63.1% 0.082 214.8)
-
Step 600
600
#228093
oklch(55.6% 0.088 214.6)
-
Step 700
700 (this color)
#166F80
oklch(50% 0.082 214.3)
-
Step 800
800
#145866
oklch(42.6% 0.068 215)
-
Step 900
900
#1A4953
oklch(37.8% 0.053 214.1)
-
Step 950
950
#112B30
oklch(27.1% 0.033 211.7)
#166F80 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) | #636B81 | 0.074 |
| Deuteranopia (no green cones) | #556180 | 0.066 |
| Tritanopia (no blue cones) | #007574 | 0.032 |
| Achromatopsia (no color) | #656565 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166F80
#166F80
oklch(50% 0.082 214.3)
- #8C5143
#8C5143
oklch(50% 0.083 34.2)
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 #166F80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.027
- Deep Aqua #08787F ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.032
- Sea Blue #047495 ΔE 0.033
- Dark Aqua #05696B ΔE 0.037
- Bluegreen #017A79 ΔE 0.040
- Ocean #017B92 ΔE 0.040
- Ocean Blue #03719C ΔE 0.044
Use #166F80 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.