#166F8F
Closest named color: Sea Blue (#047495). oklch(50.8% 0.093 228.3), rgb(22, 111, 143).
Aa
White text reads best on this color (5.66:1).
About this color
#166F8F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.093 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.015 away. White text reads best on it, at 5.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.70:1 |
| White text | 5.66:1 |
Values
| HEX | #166F8F |
| RGB | rgb(22, 111, 143) |
| HSL | hsl(196, 73%, 32%) |
| OKLCH | oklch(50.8% 0.093 228.3) |
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 #166F8F | 5.66:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #166F8F | 3.70:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #166F8F text on white | 5.66:1 | AA | Lc 77.9 | Fine for body text |
| #166F8F text on black | 3.70:1 | AA large text | Lc -23.8 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D8
oklch(80.9% 0.045 228.2)
-
Step 400
400
#70AAC4
oklch(70.8% 0.071 228)
-
Step 500
500
#4594B5
oklch(63.1% 0.092 228.2)
-
Step 600
600
#1E7EA1
oklch(55.6% 0.099 228.1)
-
Step 700
700 (this color)
#166F8F
oklch(50.8% 0.093 228.3)
-
Step 800
800
#115770
oklch(42.8% 0.077 227.7)
-
Step 900
900
#18485B
oklch(37.8% 0.06 227.9)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#166F8F 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) | #5E6D91 | 0.066 |
| Deuteranopia (no green cones) | #4E628F | 0.056 |
| Tritanopia (no blue cones) | #00787A | 0.051 |
| Achromatopsia (no color) | #676767 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166F8F
#166F8F
oklch(50.8% 0.093 228.3)
- #905433
#905433
oklch(50.8% 0.093 48.5)
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 #166F8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.015
- Ocean Blue #03719C ΔE 0.020
- Peacock Blue #016795 ΔE 0.030
- Ocean #017B92 ΔE 0.035
- Muted Blue #3B719F ΔE 0.038
- Denim #3B638C ΔE 0.040
- Deep Aqua #08787F ΔE 0.044
- Metallic Blue #4F738E ΔE 0.049
Use #166F8F 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.