#66AB4E
Closest named color: Fern (#63A950). oklch(67.4% 0.145 138.3), rgb(102, 171, 78).
Aa
Black text reads best on this color (7.50:1).
About this color
#66AB4E is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.145 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern (#63A950), ΔE 0.008 away. Black text reads best on it, at 7.50:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Fern (#63A950) |
| Black text | 7.50:1 |
| White text | 2.79:1 |
Values
| HEX | #66AB4E |
| RGB | rgb(102, 171, 78) |
| HSL | hsl(105, 37%, 49%) |
| OKLCH | oklch(67.4% 0.145 138.3) |
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 #66AB4E | 2.79:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #66AB4E | 7.50:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #66AB4E text on white | 2.79:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #66AB4E text on black | 7.50:1 | AAA | Lc -48.1 | 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
#F2F8F0
oklch(97.2% 0.012 137.8)
-
Step 100
100
#E2EEDE
oklch(93.6% 0.025 137.8)
-
Step 200
200
#C9E2C2
oklch(88.6% 0.051 138.9)
-
Step 300
300
#A4CF96
oklch(80.9% 0.09 138.1)
-
Step 400
400 (this color)
#66AB4E
oklch(67.4% 0.145 138.3)
-
Step 500
500
#46A219
oklch(63.1% 0.186 138.2)
-
Step 600
600
#358900
oklch(55.6% 0.173 138.2)
-
Step 700
700
#2B7300
oklch(49% 0.152 138.2)
-
Step 800
800
#225F00
oklch(42.8% 0.133 138.3)
-
Step 900
900
#1B4F00
oklch(37.7% 0.117 138.3)
-
Step 950
950
#102F04
oklch(27.1% 0.078 138.3)
#66AB4E 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) | #B09E45 | 0.097 |
| Deuteranopia (no green cones) | #A69854 | 0.096 |
| Tritanopia (no blue cones) | #62A696 | 0.099 |
| Achromatopsia (no color) | #9A9A9A | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AB4E
#66AB4E
oklch(67.4% 0.145 138.3)
- #BB77D0
#BB77D0
oklch(67.4% 0.146 317.9)
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 #66AB4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern #63A950 ΔE 0.008
- Dark Pastel Green #56AE57 ΔE 0.015
- Asparagus #77AB56 ΔE 0.022
- Leaf #71AA34 ΔE 0.022
- Off Green #6BA353 ΔE 0.026
- Mid Green #50A747 ΔE 0.026
- Boring Green #63B365 ΔE 0.028
- Algae #54AC68 ΔE 0.030
Use #66AB4E 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.