#166A39
Closest named color: Spruce (#0A5F38). oklch(46.3% 0.11 152.5), rgb(22, 106, 57).
Aa
White text reads best on this color (6.65:1).
About this color
#166A39 is a medium-dark, moderately saturated green. In OKLCH its lightness is 46%, its chroma 0.110 and its hue 152°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.037 away. White text reads best on it, at 6.65:1.
| Hue family | Greens |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #166A39 |
| RGB | rgb(22, 106, 57) |
| HSL | hsl(145, 66%, 25%) |
| OKLCH | oklch(46.3% 0.11 152.5) |
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 #166A39 | 6.65:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #166A39 | 3.15:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #166A39 text on white | 6.65:1 | AA | Lc 82.5 | Fine for body text |
| #166A39 text on black | 3.15:1 | AA large text | Lc -19.4 | 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
#E3EDE5
oklch(93.6% 0.015 151.8)
-
Step 200
200
#CBDFD0
oklch(88.5% 0.029 153.3)
-
Step 300
300
#A8CBB0
oklch(80.9% 0.053 151.9)
-
Step 400
400
#77B087
oklch(70.6% 0.085 152.6)
-
Step 500
500
#509C69
oklch(63% 0.108 152.8)
-
Step 600
600
#308750
oklch(55.7% 0.119 152.4)
-
Step 700
700 (this color)
#166A39
oklch(46.3% 0.11 152.5)
-
Step 800
800
#1E5D35
oklch(42.7% 0.092 152.3)
-
Step 900
900
#1F4C2F
oklch(37.6% 0.071 153.1)
-
Step 950
950
#142D1B
oklch(27.1% 0.046 151.4)
#166A39 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) | #6A6135 | 0.094 |
| Deuteranopia (no green cones) | #605A3C | 0.092 |
| Tritanopia (no blue cones) | #00685E | 0.058 |
| Achromatopsia (no color) | #5C5C5C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166A39
#166A39
oklch(46.3% 0.11 152.5)
- #7C3F74
#7C3F74
oklch(46.4% 0.111 332.3)
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 #166A39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.037
- Pine #2B5D34 ΔE 0.041
- Dark Green #006400 ΔE 0.052
- Camouflage Green #4B6113 ΔE 0.052
- Camo Green #526525 ΔE 0.055
- Army Green #4B5D16 ΔE 0.057
- Dark Green Blue #1F6357 ΔE 0.058
- Dark Olive Green #556B2F ΔE 0.059
Use #166A39 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.