#66A240
Closest named color: Off Green (#6BA353). oklch(65% 0.145 135.1), rgb(102, 162, 64).
Aa
Black text reads best on this color (6.80:1).
About this color
#66A240 is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.145 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Off Green (#6BA353), ΔE 0.021 away. Black text reads best on it, at 6.80:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Off Green (#6BA353) |
| Black text | 6.80:1 |
| White text | 3.08:1 |
Values
| HEX | #66A240 |
| RGB | rgb(102, 162, 64) |
| HSL | hsl(97, 43%, 44%) |
| OKLCH | oklch(65% 0.145 135.1) |
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 #66A240 | 3.08:1 | AA large text | Lc -63.0 | Content text, not long reading |
| Black text on #66A240 | 6.80:1 | AA | Lc 46.5 | Large or bold text, headings |
| #66A240 text on white | 3.08:1 | AA large text | Lc 57.6 | Large or bold text, headings |
| #66A240 text on black | 6.80:1 | AA | Lc -44.2 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F3F7F1
oklch(97.1% 0.009 134.9)
-
Step 100
100
#E4EDE0
oklch(93.6% 0.02 135.8)
-
Step 200
200
#CEDFC6
oklch(88.4% 0.038 135.5)
-
Step 300
300
#ADCB9D
oklch(80.8% 0.071 134.8)
-
Step 400
400
#81B067
oklch(70.6% 0.113 135.1)
-
Step 500
500 (this color)
#66A240
oklch(65% 0.145 135.1)
-
Step 600
600
#46860C
oklch(55.5% 0.158 135)
-
Step 700
700
#387100
oklch(49% 0.143 135.1)
-
Step 800
800
#2E5D05
oklch(42.8% 0.122 135.2)
-
Step 900
900
#2A4C11
oklch(37.7% 0.095 134.8)
-
Step 950
950
#192D0C
oklch(27.1% 0.061 134.9)
#66A240 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) | #A89635 | 0.089 |
| Deuteranopia (no green cones) | #9F9147 | 0.088 |
| Tritanopia (no blue cones) | #659C8D | 0.105 |
| Achromatopsia (no color) | #939393 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A240
#66A240
oklch(65% 0.145 135.1)
- #B071CB
#B071CB
oklch(64.9% 0.145 315.1)
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 #66A240, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Green #6BA353 ΔE 0.021
- Fern #63A950 ΔE 0.021
- Muted Green #5FA052 ΔE 0.021
- Mid Green #50A747 ΔE 0.022
- Flat Green #699D4C ΔE 0.022
- Leaf #71AA34 ΔE 0.030
- Dark Pastel Green #56AE57 ΔE 0.035
- Grass #5CAC2D ΔE 0.037
Use #66A240 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.