#166B7C
Closest named color: Dark Aqua (#05696B). oklch(48.8% 0.08 215), rgb(22, 107, 124).
Aa
White text reads best on this color (6.12:1).
About this color
#166B7C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.080 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.029 away. White text reads best on it, at 6.12:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.42:1 |
| White text | 6.12:1 |
Values
| HEX | #166B7C |
| RGB | rgb(22, 107, 124) |
| HSL | hsl(190, 70%, 29%) |
| OKLCH | oklch(48.8% 0.08 215) |
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 #166B7C | 6.12:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #166B7C | 3.42:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #166B7C text on white | 6.12:1 | AA | Lc 80.2 | Fine for body text |
| #166B7C text on black | 3.42:1 | AA large text | Lc -21.6 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A5C7D0
oklch(80.8% 0.039 215.6)
-
Step 400
400
#73ABB9
oklch(70.7% 0.062 215.1)
-
Step 500
500
#4A96A7
oklch(63.1% 0.079 214.3)
-
Step 600
600
#278093
oklch(55.7% 0.086 215.2)
-
Step 700
700 (this color)
#166B7C
oklch(48.8% 0.08 215)
-
Step 800
800
#185866
oklch(42.7% 0.066 215.6)
-
Step 900
900
#1C4853
oklch(37.6% 0.051 216.8)
-
Step 950
950
#122B30
oklch(27.1% 0.032 212.2)
#166B7C 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) | #5F677D | 0.071 |
| Deuteranopia (no green cones) | #525D7C | 0.065 |
| Tritanopia (no blue cones) | #007170 | 0.032 |
| Achromatopsia (no color) | #626262 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166B7C
#166B7C
oklch(48.8% 0.08 215)
- #874F40
#874F40
oklch(48.9% 0.08 35.8)
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 #166B7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.029
- Deep Turquoise #017374 ΔE 0.032
- Dark Aquamarine #017371 ΔE 0.036
- Deep Aqua #08787F ΔE 0.040
- Sea Blue #047495 ΔE 0.042
- Petrol #005F6A ΔE 0.045
- Peacock Blue #016795 ΔE 0.046
- Denim #3B638C ΔE 0.049
Use #166B7C 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.