#166D6B
Closest named color: Dark Aqua (#05696B). oklch(48.6% 0.077 192.5), rgb(22, 109, 107).
Aa
White text reads best on this color (6.11:1).
About this color
#166D6B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.077 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.015 away. White text reads best on it, at 6.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #166D6B |
| RGB | rgb(22, 109, 107) |
| HSL | hsl(179, 66%, 26%) |
| OKLCH | oklch(48.6% 0.077 192.5) |
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 #166D6B | 6.11:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #166D6B | 3.43:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #166D6B text on white | 6.11:1 | AA | Lc 80.2 | Fine for body text |
| #166D6B text on black | 3.43:1 | AA large text | Lc -21.7 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDD
oklch(88.5% 0.021 193.1)
-
Step 300
300
#A6C9C7
oklch(81% 0.037 192.2)
-
Step 400
400
#74ADAA
oklch(70.7% 0.06 191.7)
-
Step 500
500
#4B9896
oklch(63% 0.076 193.1)
-
Step 600
600
#288380
oklch(55.7% 0.083 191.8)
-
Step 700
700 (this color)
#166D6B
oklch(48.6% 0.077 192.5)
-
Step 800
800
#185A58
oklch(42.7% 0.064 192.1)
-
Step 900
900
#1C4A49
oklch(37.7% 0.05 193.3)
-
Step 950
950
#122B2A
oklch(26.9% 0.031 192.1)
#166D6B 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) | #66676B | 0.082 |
| Deuteranopia (no green cones) | #595E6C | 0.076 |
| Tritanopia (no blue cones) | #00706C | 0.010 |
| Achromatopsia (no color) | #626262 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166D6B
#166D6B
oklch(48.6% 0.077 192.5)
- #854C53
#854C53
oklch(48.6% 0.077 12.5)
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 #166D6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.015
- Dark Aquamarine #017371 ΔE 0.018
- Deep Turquoise #017374 ΔE 0.020
- Dark Green Blue #1F6357 ΔE 0.038
- Deep Aqua #08787F ΔE 0.040
- Bluegreen #017A79 ΔE 0.040
- Petrol #005F6A ΔE 0.047
- Teal #008080 ΔE 0.059
Use #166D6B 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.