#66AC44
Closest named color: Leaf (#71AA34). oklch(67.5% 0.156 136.8), rgb(102, 172, 68).
Aa
Black text reads best on this color (7.54:1).
About this color
#66AC44 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.156 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf (#71AA34), ΔE 0.014 away. Black text reads best on it, at 7.54:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Leaf (#71AA34) |
| Black text | 7.54:1 |
| White text | 2.78:1 |
Values
| HEX | #66AC44 |
| RGB | rgb(102, 172, 68) |
| HSL | hsl(100, 43%, 47%) |
| OKLCH | oklch(67.5% 0.156 136.8) |
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 #66AC44 | 2.78:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #66AC44 | 7.54:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #66AC44 text on white | 2.78:1 | Fails | Lc 53.4 | Large or bold text, headings |
| #66AC44 text on black | 7.54:1 | AAA | Lc -48.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E1EFDC
oklch(93.6% 0.029 137.4)
-
Step 200
200
#C9E2BF
oklch(88.5% 0.054 136.7)
-
Step 300
300
#A3D091
oklch(81% 0.098 137)
-
Step 400
400 (this color)
#66AC44
oklch(67.5% 0.156 136.8)
-
Step 500
500
#4AA200
oklch(63.2% 0.191 136.7)
-
Step 600
600
#3D8800
oklch(55.6% 0.168 136.7)
-
Step 700
700
#327200
oklch(49% 0.148 136.7)
-
Step 800
800
#285E00
oklch(42.8% 0.129 136.7)
-
Step 900
900
#204E00
oklch(37.6% 0.113 136.7)
-
Step 950
950
#102F00
oklch(27.1% 0.082 137)
#66AC44 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) | #B29F39 | 0.099 |
| Deuteranopia (no green cones) | #A8994C | 0.099 |
| Tritanopia (no blue cones) | #63A696 | 0.111 |
| Achromatopsia (no color) | #9B9B9B | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AC44
#66AC44
oklch(67.5% 0.156 136.8)
- #BD75D6
#BD75D6
oklch(67.6% 0.157 316.9)
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 #66AC44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf #71AA34 ΔE 0.014
- Fern #63A950 ΔE 0.017
- Dark Pastel Green #56AE57 ΔE 0.020
- Grass #5CAC2D ΔE 0.023
- Mid Green #50A747 ΔE 0.027
- Asparagus #77AB56 ΔE 0.029
- Medium Green #39AD48 ΔE 0.034
- Boring Green #63B365 ΔE 0.034
Use #66AC44 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.