#66A718
Closest named color: Leaf Green (#5CA904). oklch(65.9% 0.176 132.4), rgb(102, 167, 24).
Aa
Black text reads best on this color (7.10:1).
About this color
#66A718 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.176 and its hue 132°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.014 away. Black text reads best on it, at 7.10:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #66A718 |
| RGB | rgb(102, 167, 24) |
| HSL | hsl(87, 75%, 37%) |
| OKLCH | oklch(65.9% 0.176 132.4) |
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 #66A718 | 2.95:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #66A718 | 7.10:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #66A718 text on white | 2.95:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #66A718 text on black | 7.10:1 | AAA | Lc -46.0 | 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 500.
-
Step 50
50
#F2F7EF
oklch(97% 0.012 133.4)
-
Step 100
100
#E4EEDD
oklch(93.7% 0.025 132.1)
-
Step 200
200
#CDE0C0
oklch(88.4% 0.048 132.6)
-
Step 300
300
#ACCD93
oklch(80.9% 0.086 132.2)
-
Step 400
400
#7FB253
oklch(70.6% 0.137 132.4)
-
Step 500
500 (this color)
#66A718
oklch(65.9% 0.176 132.4)
-
Step 600
600
#4E8500
oklch(55.6% 0.155 132.4)
-
Step 700
700
#417000
oklch(49.2% 0.137 132.3)
-
Step 800
800
#345C00
oklch(42.8% 0.12 132.5)
-
Step 900
900
#2B4C00
oklch(37.6% 0.105 132.1)
-
Step 950
950
#182D02
oklch(26.9% 0.072 132.3)
#66A718 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) | #AE9900 | 0.099 |
| Deuteranopia (no green cones) | #A6942B | 0.100 |
| Tritanopia (no blue cones) | #67A08E | 0.133 |
| Achromatopsia (no color) | #969696 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A718
#66A718
oklch(65.9% 0.176 132.4)
- #B66DDE
#B66DDE
oklch(66% 0.175 312.3)
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 #66A718, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.014
- Grass #5CAC2D ΔE 0.015
- Leaf #71AA34 ΔE 0.023
- Mid Green #50A747 ΔE 0.034
- Medium Green #39AD48 ΔE 0.040
- Fern #63A950 ΔE 0.040
- Avocado Green #87A922 ΔE 0.041
- Leafy Green #51B73B ΔE 0.044
Use #66A718 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.