#166A88
Closest named color: Peacock Blue (#016795). oklch(49.1% 0.089 227.9), rgb(22, 106, 136).
Aa
White text reads best on this color (6.08:1).
About this color
#166A88 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.089 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.026 away. White text reads best on it, at 6.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.45:1 |
| White text | 6.08:1 |
Values
| HEX | #166A88 |
| RGB | rgb(22, 106, 136) |
| HSL | hsl(196, 72%, 31%) |
| OKLCH | oklch(49.1% 0.089 227.9) |
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 #166A88 | 6.08:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #166A88 | 3.45:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #166A88 text on white | 6.08:1 | AA | Lc 80.0 | Fine for body text |
| #166A88 text on black | 3.45:1 | AA large text | Lc -21.8 | 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
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE6
oklch(88.6% 0.024 227.8)
-
Step 300
300
#A5C7D7
oklch(81% 0.043 228)
-
Step 400
400
#72A9C2
oklch(70.6% 0.068 228.2)
-
Step 500
500
#4994B3
oklch(63.1% 0.088 227.6)
-
Step 600
600
#257E9F
oklch(55.7% 0.095 227.6)
-
Step 700
700 (this color)
#166A88
oklch(49.1% 0.089 227.9)
-
Step 800
800
#17566E
oklch(42.6% 0.073 228.2)
-
Step 900
900
#1B4759
oklch(37.6% 0.057 228.1)
-
Step 950
950
#112A34
oklch(27% 0.036 226.6)
#166A88 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) | #5A6889 | 0.063 |
| Deuteranopia (no green cones) | #4B5E88 | 0.054 |
| Tritanopia (no blue cones) | #007374 | 0.050 |
| Achromatopsia (no color) | #626262 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166A88
#166A88
oklch(49.1% 0.089 227.9)
- #895032
#895032
oklch(49.1% 0.088 47.6)
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 #166A88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.026
- Sea Blue #047495 ΔE 0.032
- Ocean Blue #03719C ΔE 0.034
- Denim #3B638C ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.049
- Dark Aqua #05696B ΔE 0.049
- Deep Turquoise #017374 ΔE 0.050
- Deep Aqua #08787F ΔE 0.050
Use #166A88 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.