#66A017
Closest named color: Leaf Green (#5CA904). oklch(64.1% 0.168 131.3), rgb(102, 160, 23).
Aa
Black text reads best on this color (6.60:1).
About this color
#66A017 is a medium-light, vivid green. In OKLCH its lightness is 64%, its chroma 0.168 and its hue 131°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.028 away. Black text reads best on it, at 6.60:1.
| Hue family | Greens |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.168) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 6.60:1 |
| White text | 3.17:1 |
Values
| HEX | #66A017 |
| RGB | rgb(102, 160, 23) |
| HSL | hsl(85, 75%, 36%) |
| OKLCH | oklch(64.1% 0.168 131.3) |
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 #66A017 | 3.17:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #66A017 | 6.60:1 | AA | Lc 45.4 | Large or bold text, headings |
| #66A017 text on white | 3.17:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #66A017 text on black | 6.60:1 | AA | Lc -43.0 | 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
#F3F7EF
oklch(97.1% 0.011 128.6)
-
Step 100
100
#E4EDDD
oklch(93.5% 0.023 131.1)
-
Step 200
200
#CFE0C1
oklch(88.6% 0.045 130.9)
-
Step 300
300
#AECC94
oklch(80.9% 0.083 131)
-
Step 400
400
#83B156
oklch(70.7% 0.131 131.2)
-
Step 500
500 (this color)
#66A017
oklch(64.1% 0.168 131.3)
-
Step 600
600
#518400
oklch(55.5% 0.153 131.4)
-
Step 700
700
#446F00
oklch(49.1% 0.134 131.1)
-
Step 800
800
#375B00
oklch(42.7% 0.117 131.1)
-
Step 900
900
#2D4C00
oklch(37.8% 0.103 131.1)
-
Step 950
950
#1A2D03
oklch(27.1% 0.069 131)
#66A017 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) | #A79300 | 0.091 |
| Deuteranopia (no green cones) | #A08F29 | 0.092 |
| Tritanopia (no blue cones) | #689988 | 0.129 |
| Achromatopsia (no color) | #909090 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A017
#66A017
oklch(64.1% 0.168 131.3)
- #AD6AD6
#AD6AD6
oklch(64.1% 0.168 311.2)
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 #66A017, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.028
- Grass #5CAC2D ΔE 0.032
- Mid Green #50A747 ΔE 0.034
- Leaf #71AA34 ΔE 0.035
- Grassy Green #419C03 ΔE 0.040
- Grass Green #3F9B0B ΔE 0.042
- Fern #63A950 ΔE 0.043
- Flat Green #699D4C ΔE 0.044
Use #66A017 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.