#66AF28
Closest named color: Grass (#5CAC2D). oklch(68.1% 0.179 134.3), rgb(102, 175, 40).
Aa
Black text reads best on this color (7.72:1).
About this color
#66AF28 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.179 and its hue 134°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.014 away. Black text reads best on it, at 7.72:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.179) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #66AF28 |
| RGB | rgb(102, 175, 40) |
| HSL | hsl(92, 63%, 42%) |
| OKLCH | oklch(68.1% 0.179 134.3) |
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 #66AF28 | 2.71:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #66AF28 | 7.72:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #66AF28 text on white | 2.71:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #66AF28 text on black | 7.72:1 | AAA | Lc -49.5 | 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
#F1F8EE
oklch(97.1% 0.015 136.1)
-
Step 100
100
#E1EFD9
oklch(93.6% 0.033 133.9)
-
Step 200
200
#C8E3BA
oklch(88.5% 0.062 134.9)
-
Step 300
300
#A2D186
oklch(80.9% 0.112 134.4)
-
Step 400
400 (this color)
#66AF28
oklch(68.1% 0.179 134.3)
-
Step 500
500
#56A000
oklch(63.2% 0.183 134.3)
-
Step 600
600
#478600
oklch(55.6% 0.16 134.3)
-
Step 700
700
#3B7100
oklch(49.2% 0.142 134.3)
-
Step 800
800
#2F5C00
oklch(42.5% 0.123 134.3)
-
Step 900
900
#264D00
oklch(37.6% 0.109 134.4)
-
Step 950
950
#152E00
oklch(27% 0.078 134)
#66AF28 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) | #B6A104 | 0.104 |
| Deuteranopia (no green cones) | #AC9B36 | 0.105 |
| Tritanopia (no blue cones) | #65A896 | 0.132 |
| Achromatopsia (no color) | #9D9D9D | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AF28
#66AF28
oklch(68.1% 0.179 134.3)
- #C071E4
#C071E4
oklch(68% 0.18 314.3)
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 #66AF28, closest first.
No curated palette has a color within ΔE 0.04 of #66AF28.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.014
- Leaf #71AA34 ΔE 0.022
- Leaf Green #5CA904 ΔE 0.024
- Leafy Green #51B73B ΔE 0.025
- Avocado Green #87A922 ΔE 0.038
- Medium Green #39AD48 ΔE 0.040
- Dark Pastel Green #56AE57 ΔE 0.040
- Fern #63A950 ΔE 0.041
Use #66AF28 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.