#166D5D
Closest named color: Dark Aqua (#05696B). oklch(48.1% 0.083 176.9), rgb(22, 109, 93).
Aa
White text reads best on this color (6.21:1).
About this color
#166D5D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 48%, its chroma 0.083 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.030 away. White text reads best on it, at 6.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.37:1 |
| White text | 6.21:1 |
Values
| HEX | #166D5D |
| RGB | rgb(22, 109, 93) |
| HSL | hsl(169, 66%, 26%) |
| OKLCH | oklch(48.1% 0.083 176.9) |
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 #166D5D | 6.21:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #166D5D | 3.37:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #166D5D text on white | 6.21:1 | AA | Lc 80.6 | Fine for body text |
| #166D5D text on black | 3.37:1 | AA large text | Lc -21.2 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A6CAC0
oklch(81% 0.041 176.5)
-
Step 400
400
#74AEA0
oklch(70.7% 0.064 177.5)
-
Step 500
500
#4C9A88
oklch(63.1% 0.082 176.5)
-
Step 600
600
#2A8472
oklch(55.6% 0.089 176.8)
-
Step 700
700 (this color)
#166D5D
oklch(48.1% 0.083 176.9)
-
Step 800
800
#1A5B4E
oklch(42.7% 0.068 176.8)
-
Step 900
900
#1D4B41
oklch(37.8% 0.053 176.8)
-
Step 950
950
#122C26
oklch(27% 0.034 176.7)
#166D5D 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) | #68665C | 0.086 |
| Deuteranopia (no green cones) | #5D5D5E | 0.083 |
| Tritanopia (no blue cones) | #006F68 | 0.017 |
| Achromatopsia (no color) | #616161 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166D5D
#166D5D
oklch(48.1% 0.083 176.9)
- #83495F
#83495F
oklch(48.1% 0.083 356.5)
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 #166D5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.030
- Dark Green Blue #1F6357 ΔE 0.030
- Dark Aquamarine #017371 ΔE 0.031
- Deep Turquoise #017374 ΔE 0.035
- Bluegreen #017A79 ΔE 0.050
- Deep Aqua #08787F ΔE 0.055
- Petrol #005F6A ΔE 0.057
- Spruce #0A5F38 ΔE 0.064
Use #166D5D 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.