#166F56
Closest named color: Dark Green Blue (#1F6357). oklch(48.5% 0.09 168.9), rgb(22, 111, 86).
Aa
White text reads best on this color (6.10:1).
About this color
#166F56 is a medium-dark, moderately saturated green. In OKLCH its lightness is 48%, its chroma 0.090 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.039 away. White text reads best on it, at 6.10:1.
| Hue family | Greens |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #166F56 |
| RGB | rgb(22, 111, 86) |
| HSL | hsl(163, 67%, 26%) |
| OKLCH | oklch(48.5% 0.09 168.9) |
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 #166F56 | 6.10:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #166F56 | 3.44:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #166F56 text on white | 6.10:1 | AA | Lc 80.1 | Fine for body text |
| #166F56 text on black | 3.44:1 | AA large text | Lc -21.7 | 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
#E2EDE8
oklch(93.6% 0.013 167.2)
-
Step 200
200
#CBDFD6
oklch(88.6% 0.025 167)
-
Step 300
300
#A6CABC
oklch(80.9% 0.043 169.6)
-
Step 400
400
#74AF99
oklch(70.7% 0.07 168.9)
-
Step 500
500
#4C9B80
oklch(63.1% 0.089 168.7)
-
Step 600
600
#288569
oklch(55.5% 0.097 168.8)
-
Step 700
700 (this color)
#166F56
oklch(48.5% 0.09 168.9)
-
Step 800
800
#195C48
oklch(42.7% 0.074 169)
-
Step 900
900
#1C4B3C
oklch(37.5% 0.058 169.3)
-
Step 950
950
#122C23
oklch(26.9% 0.037 168.7)
#166F56 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) | #6C6755 | 0.091 |
| Deuteranopia (no green cones) | #615F58 | 0.088 |
| Tritanopia (no blue cones) | #007068 | 0.027 |
| Achromatopsia (no color) | #626262 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166F56
#166F56
oklch(48.5% 0.09 168.9)
- #844967
#844967
oklch(48.6% 0.089 349.1)
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 #166F56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.039
- Dark Aquamarine #017371 ΔE 0.040
- Dark Aqua #05696B ΔE 0.044
- Deep Turquoise #017374 ΔE 0.045
- Bluegreen #017A79 ΔE 0.055
- Spruce #0A5F38 ΔE 0.060
- Pine #2B5D34 ΔE 0.062
- Deep Aqua #08787F ΔE 0.063
Use #166F56 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.