#166366
Closest named color: Dark Aqua (#05696B). oklch(45.7% 0.071 198.9), rgb(22, 99, 102).
Aa
White text reads best on this color (6.97:1).
About this color
#166366 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.071 and its hue 199°. 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 6.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.01:1 |
| White text | 6.97:1 |
Values
| HEX | #166366 |
| RGB | rgb(22, 99, 102) |
| HSL | hsl(182, 65%, 24%) |
| OKLCH | oklch(45.7% 0.071 198.9) |
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 #166366 | 6.97:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #166366 | 3.01:1 | AA large text | Lc 20.2 | Dividers and decoration only |
| #166366 text on white | 6.97:1 | AA | Lc 83.8 | Fine for body text |
| #166366 text on black | 3.01:1 | AA large text | Lc -18.1 | 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 800.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECED
oklch(93.5% 0.012 203.5)
-
Step 200
200
#C9DEDF
oklch(88.5% 0.022 200.2)
-
Step 300
300
#A2C9CB
oklch(80.8% 0.041 200.2)
-
Step 400
400
#6DAEB0
oklch(70.8% 0.067 198.3)
-
Step 500
500
#3F999D
oklch(63.1% 0.085 199.3)
-
Step 600
600
#0E8387
oklch(55.5% 0.092 198.7)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800 (this color)
#166366
oklch(45.7% 0.071 198.9)
-
Step 900
900
#144A4D
oklch(37.6% 0.055 200.4)
-
Step 950
950
#0E2C2D
oklch(27.1% 0.035 198.3)
#166366 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) | #5B5E66 | 0.072 |
| Deuteranopia (no green cones) | #505666 | 0.067 |
| Tritanopia (no blue cones) | #006764 | 0.015 |
| Achromatopsia (no color) | #595959 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166366
#166366
oklch(45.7% 0.071 198.9)
- #7A4647
#7A4647
oklch(45.6% 0.072 19)
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 #166366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.018
- Petrol #005F6A ΔE 0.019
- Dark Green Blue #1F6357 ΔE 0.025
- Deep Teal #00555A ΔE 0.048
- Dark Aquamarine #017371 ΔE 0.049
- Deep Turquoise #017374 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.059
- Slate #516572 ΔE 0.063
Use #166366 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.