#166A59
Closest named color: Dark Green Blue (#1F6357). oklch(47.2% 0.081 175.4), rgb(22, 106, 89).
Aa
White text reads best on this color (6.48:1).
About this color
#166A59 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.081 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.022 away. White text reads best on it, at 6.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.23:1 |
| White text | 6.48:1 |
Values
| HEX | #166A59 |
| RGB | rgb(22, 106, 89) |
| HSL | hsl(168, 66%, 25%) |
| OKLCH | oklch(47.2% 0.081 175.4) |
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 #166A59 | 6.48:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #166A59 | 3.23:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #166A59 text on white | 6.48:1 | AA | Lc 81.8 | Fine for body text |
| #166A59 text on black | 3.23:1 | AA large text | Lc -20.1 | 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
#E2ECE9
oklch(93.5% 0.011 176.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A7C9BF
oklch(80.8% 0.039 175.5)
-
Step 400
400
#76AE9F
oklch(70.8% 0.063 175.8)
-
Step 500
500
#4F9A87
oklch(63.2% 0.081 175)
-
Step 600
600
#2D8471
oklch(55.6% 0.088 175.6)
-
Step 700
700 (this color)
#166A59
oklch(47.2% 0.081 175.4)
-
Step 800
800
#1C5B4D
oklch(42.7% 0.068 175.3)
-
Step 900
900
#1E4B40
oklch(37.8% 0.053 174.9)
-
Step 950
950
#132C26
oklch(27.1% 0.033 176.2)
#166A59 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) | #666358 | 0.085 |
| Deuteranopia (no green cones) | #5B5B5A | 0.081 |
| Tritanopia (no blue cones) | #006B65 | 0.018 |
| Achromatopsia (no color) | #5E5E5E | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166A59
#166A59
oklch(47.2% 0.081 175.4)
- #7F475D
#7F475D
oklch(47.2% 0.081 355.7)
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 #166A59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.022
- Dark Aqua #05696B ΔE 0.030
- Dark Aquamarine #017371 ΔE 0.040
- Deep Turquoise #017374 ΔE 0.044
- Petrol #005F6A ΔE 0.053
- Spruce #0A5F38 ΔE 0.055
- Pine #2B5D34 ΔE 0.057
- Bluegreen #017A79 ΔE 0.060
Use #166A59 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.