#66AE00
Closest named color: Leaf Green (#5CA904). oklch(67.7% 0.19 132.7), rgb(102, 174, 0).
Aa
Black text reads best on this color (7.61:1).
About this color
#66AE00 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.190 and its hue 133°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.019 away. Black text reads best on it, at 7.61:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.190) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #66AE00 |
| RGB | rgb(102, 174, 0) |
| HSL | hsl(85, 100%, 34%) |
| OKLCH | oklch(67.7% 0.19 132.7) |
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 #66AE00 | 2.75:1 | Fails | Lc -58.1 | Large or bold text, headings |
| Black text on #66AE00 | 7.61:1 | AAA | Lc 51.1 | Large or bold text, headings |
| #66AE00 text on white | 2.75:1 | Fails | Lc 52.9 | Large or bold text, headings |
| #66AE00 text on black | 7.61:1 | AAA | Lc -49.0 | 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 400.
-
Step 50
50
#F1F8ED
oklch(97.1% 0.016 133.8)
-
Step 100
100
#E1EFD8
oklch(93.5% 0.034 133)
-
Step 200
200
#C9E3B6
oklch(88.5% 0.066 132.2)
-
Step 300
300
#A3D180
oklch(80.9% 0.118 132.6)
-
Step 400
400 (this color)
#66AE00
oklch(67.7% 0.19 132.7)
-
Step 500
500
#5C9E00
oklch(63% 0.177 132.8)
-
Step 600
600
#4D8500
oklch(55.6% 0.156 132.7)
-
Step 700
700
#407000
oklch(49.1% 0.138 132.7)
-
Step 800
800
#335C00
oklch(42.8% 0.12 132.9)
-
Step 900
900
#2A4C00
oklch(37.6% 0.105 132.5)
-
Step 950
950
#172E00
oklch(27.1% 0.076 132.8)
#66AE00 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) | #B69F00 | 0.110 |
| Deuteranopia (no green cones) | #AC9A23 | 0.107 |
| Tritanopia (no blue cones) | #67A693 | 0.143 |
| Achromatopsia (no color) | #9C9C9C | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AE00
#66AE00
oklch(67.7% 0.19 132.7)
- #BF6EE9
#BF6EE9
oklch(67.7% 0.189 312.8)
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 #66AE00, closest first.
No curated palette has a color within ΔE 0.04 of #66AE00.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.019
- Grass #5CAC2D ΔE 0.019
- Leafy Green #51B73B ΔE 0.030
- Leaf #71AA34 ΔE 0.031
- Frog Green #58BC08 ΔE 0.039
- Avocado Green #87A922 ΔE 0.044
- Dark Lime #84B701 ΔE 0.044
- Medium Green #39AD48 ΔE 0.046
Use #66AE00 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.