#166E40
Closest named color: Spruce (#0A5F38). oklch(47.7% 0.109 154.8), rgb(22, 110, 64).
Aa
White text reads best on this color (6.29:1).
About this color
#166E40 is a medium-dark, moderately saturated green. In OKLCH its lightness is 48%, its chroma 0.109 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.049 away. White text reads best on it, at 6.29:1.
| Hue family | Greens |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #166E40 |
| RGB | rgb(22, 110, 64) |
| HSL | hsl(149, 67%, 26%) |
| OKLCH | oklch(47.7% 0.109 154.8) |
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 #166E40 | 6.29:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #166E40 | 3.33:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #166E40 text on white | 6.29:1 | AA | Lc 80.9 | Fine for body text |
| #166E40 text on black | 3.33:1 | AA large text | Lc -20.9 | 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
#E2EDE5
oklch(93.6% 0.016 154.5)
-
Step 200
200
#CBDFD1
oklch(88.5% 0.029 155.2)
-
Step 300
300
#A7CBB2
oklch(80.9% 0.052 154.8)
-
Step 400
400
#75B089
oklch(70.6% 0.084 154.7)
-
Step 500
500
#4D9D6C
oklch(63.2% 0.109 154.8)
-
Step 600
600
#2B8754
oklch(55.6% 0.117 155)
-
Step 700
700 (this color)
#166E40
oklch(47.7% 0.109 154.8)
-
Step 800
800
#1B5D38
oklch(42.7% 0.09 154.7)
-
Step 900
900
#1E4C31
oklch(37.6% 0.069 155.2)
-
Step 950
950
#132D1D
oklch(27.1% 0.044 155)
#166E40 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) | #6E643D | 0.097 |
| Deuteranopia (no green cones) | #635D43 | 0.094 |
| Tritanopia (no blue cones) | #006D62 | 0.053 |
| Achromatopsia (no color) | #606060 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166E40
#166E40
oklch(47.7% 0.109 154.8)
- #814275
#814275
oklch(47.6% 0.11 334.7)
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 #166E40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.049
- Pine #2B5D34 ΔE 0.051
- Dark Olive Green #556B2F ΔE 0.056
- Camo Green #526525 ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.058
- Camouflage Green #4B6113 ΔE 0.059
- Jungle Green #048243 ΔE 0.062
- Dark Green #006400 ΔE 0.063
Use #166E40 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.