#166D7C
Closest named color: Deep Turquoise (#017374). oklch(49.3% 0.08 212.5), rgb(22, 109, 124).
Aa
White text reads best on this color (5.97:1).
About this color
#166D7C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.080 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.027 away. White text reads best on it, at 5.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #166D7C |
| RGB | rgb(22, 109, 124) |
| HSL | hsl(189, 70%, 29%) |
| OKLCH | oklch(49.3% 0.08 212.5) |
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 #166D7C | 5.97:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #166D7C | 3.51:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #166D7C text on white | 5.97:1 | AA | Lc 79.5 | Fine for body text |
| #166D7C text on black | 3.51:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE1
oklch(88.5% 0.021 211.8)
-
Step 300
300
#A5C8CF
oklch(81% 0.039 211.1)
-
Step 400
400
#72ABB7
oklch(70.6% 0.062 212.3)
-
Step 500
500
#4996A6
oklch(63.1% 0.079 213.1)
-
Step 600
600
#258091
oklch(55.5% 0.086 213)
-
Step 700
700 (this color)
#166D7C
oklch(49.3% 0.08 212.5)
-
Step 800
800
#165864
oklch(42.6% 0.066 212.6)
-
Step 900
900
#1B4952
oklch(37.8% 0.052 212.6)
-
Step 950
950
#112B30
oklch(27.1% 0.033 211.7)
#166D7C 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) | #62697D | 0.074 |
| Deuteranopia (no green cones) | #545F7C | 0.067 |
| Tritanopia (no blue cones) | #007372 | 0.029 |
| Achromatopsia (no color) | #636363 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166D7C
#166D7C
oklch(49.3% 0.08 212.5)
- #895044
#895044
oklch(49.4% 0.08 32.7)
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 #166D7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.027
- Dark Aqua #05696B ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.030
- Deep Aqua #08787F ΔE 0.033
- Sea Blue #047495 ΔE 0.040
- Bluegreen #017A79 ΔE 0.043
- Ocean #017B92 ΔE 0.047
- Petrol #005F6A ΔE 0.050
Use #166D7C 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.