#166C8C
Closest named color: Sea Blue (#047495). oklch(49.8% 0.091 229), rgb(22, 108, 140).
Aa
White text reads best on this color (5.90:1).
About this color
#166C8C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.091 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.025 away. White text reads best on it, at 5.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.55:1 |
| White text | 5.90:1 |
Values
| HEX | #166C8C |
| RGB | rgb(22, 108, 140) |
| HSL | hsl(196, 73%, 32%) |
| OKLCH | oklch(49.8% 0.091 229) |
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 #166C8C | 5.90:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #166C8C | 3.55:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #166C8C text on white | 5.90:1 | AA | Lc 79.1 | Fine for body text |
| #166C8C text on black | 3.55:1 | AA large text | Lc -22.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A4C7D8
oklch(81% 0.044 228.9)
-
Step 400
400
#71A9C4
oklch(70.6% 0.071 229.8)
-
Step 500
500
#4794B5
oklch(63.1% 0.09 228.7)
-
Step 600
600
#227EA1
oklch(55.7% 0.098 228.7)
-
Step 700
700 (this color)
#166C8C
oklch(49.8% 0.091 229)
-
Step 800
800
#155670
oklch(42.6% 0.076 229.8)
-
Step 900
900
#1A475A
oklch(37.6% 0.058 229.1)
-
Step 950
950
#112A35
oklch(27.1% 0.037 229)
#166C8C 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) | #5B6A8E | 0.064 |
| Deuteranopia (no green cones) | #4C5F8C | 0.056 |
| Tritanopia (no blue cones) | #007577 | 0.051 |
| Achromatopsia (no color) | #646464 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166C8C
#166C8C
oklch(49.8% 0.091 229)
- #8C5231
#8C5231
oklch(49.9% 0.091 49.2)
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 #166C8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.025
- Peacock Blue #016795 ΔE 0.025
- Ocean Blue #03719C ΔE 0.026
- Denim #3B638C ΔE 0.035
- Muted Blue #3B719F ΔE 0.044
- Ocean #017B92 ΔE 0.044
- Deep Aqua #08787F ΔE 0.048
- Deep Turquoise #017374 ΔE 0.051
Use #166C8C 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.