#166D73
Closest named color: Dark Aqua (#05696B). oklch(49% 0.077 202.1), rgb(22, 109, 115).
Aa
White text reads best on this color (6.05:1).
About this color
#166D73 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.077 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.018 away. White text reads best on it, at 6.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.46:1 |
| White text | 6.05:1 |
Values
| HEX | #166D73 |
| RGB | rgb(22, 109, 115) |
| HSL | hsl(184, 68%, 27%) |
| OKLCH | oklch(49% 0.077 202.1) |
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 #166D73 | 6.05:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #166D73 | 3.46:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #166D73 text on white | 6.05:1 | AA | Lc 79.9 | Fine for body text |
| #166D73 text on black | 3.46:1 | AA large text | Lc -22.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDDF
oklch(88.4% 0.021 204.4)
-
Step 300
300
#A5C8CB
oklch(80.8% 0.038 202.8)
-
Step 400
400
#73ACB1
oklch(70.7% 0.06 202.9)
-
Step 500
500
#4A979D
oklch(63% 0.076 202.2)
-
Step 600
600
#268288
oklch(55.7% 0.083 201.4)
-
Step 700
700 (this color)
#166D73
oklch(49% 0.077 202.1)
-
Step 800
800
#17595E
oklch(42.6% 0.064 202.5)
-
Step 900
900
#1C494D
oklch(37.6% 0.049 203.3)
-
Step 950
950
#122B2D
oklch(27% 0.031 202.3)
#166D73 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) | #646873 | 0.078 |
| Deuteranopia (no green cones) | #575F73 | 0.071 |
| Tritanopia (no blue cones) | #00726F | 0.019 |
| Achromatopsia (no color) | #636363 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166D73
#166D73
oklch(49% 0.077 202.1)
- #874E4C
#874E4C
oklch(49% 0.077 22.4)
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 #166D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.018
- Deep Turquoise #017374 ΔE 0.019
- Dark Aquamarine #017371 ΔE 0.020
- Deep Aqua #08787F ΔE 0.034
- Bluegreen #017A79 ΔE 0.039
- Petrol #005F6A ΔE 0.046
- Dark Green Blue #1F6357 ΔE 0.047
- Sea Blue #047495 ΔE 0.053
Use #166D73 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.