#166C83
Closest named color: Sea Blue (#047495). oklch(49.4% 0.084 221), rgb(22, 108, 131).
Aa
White text reads best on this color (5.98:1).
About this color
#166C83 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.084 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.032 away. White text reads best on it, at 5.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.50:1 |
| White text | 5.98:1 |
Values
| HEX | #166C83 |
| RGB | rgb(22, 108, 131) |
| HSL | hsl(193, 71%, 30%) |
| OKLCH | oklch(49.4% 0.084 221) |
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 #166C83 | 5.98:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #166C83 | 3.50:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #166C83 text on white | 5.98:1 | AA | Lc 79.6 | Fine for body text |
| #166C83 text on black | 3.50:1 | AA large text | Lc -22.3 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D3
oklch(80.9% 0.04 221.2)
-
Step 400
400
#72AABD
oklch(70.6% 0.065 221.3)
-
Step 500
500
#4995AD
oklch(63.1% 0.083 221.2)
-
Step 600
600
#247F98
oklch(55.6% 0.09 220.6)
-
Step 700
700 (this color)
#166C83
oklch(49.4% 0.084 221)
-
Step 800
800
#16576A
oklch(42.6% 0.07 221.9)
-
Step 900
900
#1B4856
oklch(37.7% 0.054 221.6)
-
Step 950
950
#112A32
oklch(26.9% 0.034 221.3)
#166C83 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) | #5E6984 | 0.068 |
| Deuteranopia (no green cones) | #505F83 | 0.060 |
| Tritanopia (no blue cones) | #007373 | 0.040 |
| Achromatopsia (no color) | #636363 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166C83
#166C83
oklch(49.4% 0.084 221)
- #8A503B
#8A503B
oklch(49.4% 0.085 40.5)
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 #166C83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.032
- Peacock Blue #016795 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.038
- Ocean Blue #03719C ΔE 0.039
- Deep Aqua #08787F ΔE 0.040
- Dark Aqua #05696B ΔE 0.040
- Denim #3B638C ΔE 0.042
- Dark Aquamarine #017371 ΔE 0.042
Use #166C83 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.