#166E8C
Closest named color: Sea Blue (#047495). oklch(50.4% 0.09 226.9), rgb(22, 110, 140).
Aa
White text reads best on this color (5.76:1).
About this color
#166E8C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.090 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.020 away. White text reads best on it, at 5.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.64:1 |
| White text | 5.76:1 |
Values
| HEX | #166E8C |
| RGB | rgb(22, 110, 140) |
| HSL | hsl(195, 73%, 32%) |
| OKLCH | oklch(50.4% 0.09 226.9) |
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 #166E8C | 5.76:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #166E8C | 3.64:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #166E8C text on white | 5.76:1 | AA | Lc 78.4 | Fine for body text |
| #166E8C text on black | 3.64:1 | AA large text | Lc -23.3 | 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
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A4C7D7
oklch(80.9% 0.044 227.3)
-
Step 400
400
#70AAC3
oklch(70.7% 0.071 227)
-
Step 500
500
#4694B3
oklch(63% 0.089 226.9)
-
Step 600
600
#207E9F
oklch(55.5% 0.097 226.9)
-
Step 700
700 (this color)
#166E8C
oklch(50.4% 0.09 226.9)
-
Step 800
800
#13576F
oklch(42.8% 0.075 227)
-
Step 900
900
#19485A
oklch(37.8% 0.059 226.9)
-
Step 950
950
#102A34
oklch(27% 0.037 225.8)
#166E8C 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) | #5E6C8D | 0.066 |
| Deuteranopia (no green cones) | #4F618C | 0.058 |
| Tritanopia (no blue cones) | #007778 | 0.049 |
| Achromatopsia (no color) | #666666 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166E8C
#166E8C
oklch(50.4% 0.09 226.9)
- #8E5335
#8E5335
oklch(50.4% 0.09 46.9)
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 #166E8C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.020
- Ocean Blue #03719C ΔE 0.025
- Peacock Blue #016795 ΔE 0.030
- Ocean #017B92 ΔE 0.038
- Denim #3B638C ΔE 0.039
- Muted Blue #3B719F ΔE 0.042
- Deep Aqua #08787F ΔE 0.042
- Deep Turquoise #017374 ΔE 0.047
Use #166E8C 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.