#166A40
Closest named color: Spruce (#0A5F38). oklch(46.5% 0.103 156), rgb(22, 106, 64).
Aa
White text reads best on this color (6.62:1).
About this color
#166A40 is a medium-dark, moderately saturated green. In OKLCH its lightness is 46%, its chroma 0.103 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.036 away. White text reads best on it, at 6.62:1.
| Hue family | Greens |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 3.16:1 |
| White text | 6.62:1 |
Values
| HEX | #166A40 |
| RGB | rgb(22, 106, 64) |
| HSL | hsl(150, 66%, 25%) |
| OKLCH | oklch(46.5% 0.103 156) |
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 #166A40 | 6.62:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #166A40 | 3.16:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #166A40 text on white | 6.62:1 | AA | Lc 82.4 | Fine for body text |
| #166A40 text on black | 3.16:1 | AA large text | Lc -19.5 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE6
oklch(93.7% 0.014 155.6)
-
Step 200
200
#CBDFD2
oklch(88.5% 0.028 157.3)
-
Step 300
300
#A7CBB3
oklch(80.9% 0.051 155.9)
-
Step 400
400
#77B08C
oklch(70.8% 0.08 156)
-
Step 500
500
#509C6F
oklch(63.1% 0.103 155.9)
-
Step 600
600
#2F8657
oklch(55.5% 0.111 156.1)
-
Step 700
700 (this color)
#166A40
oklch(46.5% 0.103 156)
-
Step 800
800
#1E5D3B
oklch(42.8% 0.086 156.1)
-
Step 900
900
#1F4C32
oklch(37.7% 0.067 155.8)
-
Step 950
950
#132D1E
oklch(27.1% 0.043 156.6)
#166A40 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) | #69613D | 0.092 |
| Deuteranopia (no green cones) | #5F5A43 | 0.090 |
| Tritanopia (no blue cones) | #00695F | 0.049 |
| Achromatopsia (no color) | #5D5D5D | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166A40
#166A40
oklch(46.5% 0.103 156)
- #7C416F
#7C416F
oklch(46.5% 0.102 335.9)
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 #166A40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.036
- Pine #2B5D34 ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.049
- Camo Green #526525 ΔE 0.056
- Camouflage Green #4B6113 ΔE 0.057
- Dark Olive Green #556B2F ΔE 0.060
- Army Green #4B5D16 ΔE 0.060
- Dark Green #006400 ΔE 0.061
Use #166A40 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.