#166A5C
Closest named color: Dark Green Blue (#1F6357). oklch(47.3% 0.08 178.6), rgb(22, 106, 92).
Aa
White text reads best on this color (6.46:1).
About this color
#166A5C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.080 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.021 away. White text reads best on it, at 6.46:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.25:1 |
| White text | 6.46:1 |
Values
| HEX | #166A5C |
| RGB | rgb(22, 106, 92) |
| HSL | hsl(170, 66%, 25%) |
| OKLCH | oklch(47.3% 0.08 178.6) |
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 #166A5C | 6.46:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #166A5C | 3.25:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #166A5C text on white | 6.46:1 | AA | Lc 81.7 | Fine for body text |
| #166A5C text on black | 3.25:1 | AA large text | Lc -20.2 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A7C9C1
oklch(80.9% 0.038 179.4)
-
Step 400
400
#76AEA1
oklch(70.8% 0.062 178.3)
-
Step 500
500
#4E998A
oklch(63% 0.079 179)
-
Step 600
600
#2D8474
oklch(55.7% 0.086 178.5)
-
Step 700
700 (this color)
#166A5C
oklch(47.3% 0.08 178.6)
-
Step 800
800
#1C5B4F
oklch(42.8% 0.067 177.9)
-
Step 900
900
#1E4B42
oklch(37.8% 0.052 178.3)
-
Step 950
950
#132C27
oklch(27.1% 0.033 179.2)
#166A5C 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) | #65635B | 0.083 |
| Deuteranopia (no green cones) | #5A5B5D | 0.080 |
| Tritanopia (no blue cones) | #006C66 | 0.015 |
| Achromatopsia (no color) | #5E5E5E | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166A5C
#166A5C
oklch(47.3% 0.08 178.6)
- #7F485B
#7F485B
oklch(47.3% 0.079 358.4)
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 #166A5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.021
- Dark Aqua #05696B ΔE 0.026
- Dark Aquamarine #017371 ΔE 0.036
- Deep Turquoise #017374 ΔE 0.040
- Petrol #005F6A ΔE 0.049
- Bluegreen #017A79 ΔE 0.057
- Spruce #0A5F38 ΔE 0.059
- Pine #2B5D34 ΔE 0.060
Use #166A5C 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.