#66AA33
Closest named color: Leaf (#71AA34). oklch(66.9% 0.166 134.6), rgb(102, 170, 51).
Aa
Black text reads best on this color (7.36:1).
About this color
#66AA33 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.166 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf (#71AA34), ΔE 0.012 away. Black text reads best on it, at 7.36:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Leaf (#71AA34) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #66AA33 |
| RGB | rgb(102, 170, 51) |
| HSL | hsl(94, 54%, 43%) |
| OKLCH | oklch(66.9% 0.166 134.6) |
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 #66AA33 | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #66AA33 | 7.36:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #66AA33 text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #66AA33 text on black | 7.36:1 | AAA | Lc -47.4 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E3EEDE
oklch(93.6% 0.024 135.7)
-
Step 200
200
#CDE0C3
oklch(88.5% 0.044 134.7)
-
Step 300
300
#ABCD98
oklch(81% 0.081 134.6)
-
Step 400
400
#7DB25C
oklch(70.6% 0.13 134.6)
-
Step 500
500 (this color)
#66AA33
oklch(66.9% 0.166 134.6)
-
Step 600
600
#468600
oklch(55.5% 0.161 134.6)
-
Step 700
700
#3A7100
oklch(49.1% 0.142 134.6)
-
Step 800
800
#2F5D00
oklch(42.8% 0.124 134.5)
-
Step 900
900
#264D01
oklch(37.6% 0.108 134.6)
-
Step 950
950
#172D06
oklch(26.9% 0.068 134.3)
#66AA33 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) | #B09C21 | 0.098 |
| Deuteranopia (no green cones) | #A7973E | 0.099 |
| Tritanopia (no blue cones) | #65A392 | 0.121 |
| Achromatopsia (no color) | #999999 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AA33
#66AA33
oklch(66.9% 0.166 134.6)
- #BA71DA
#BA71DA
oklch(66.8% 0.166 314.8)
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 #66AA33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf #71AA34 ΔE 0.012
- Grass #5CAC2D ΔE 0.013
- Leaf Green #5CA904 ΔE 0.025
- Fern #63A950 ΔE 0.027
- Mid Green #50A747 ΔE 0.027
- Dark Pastel Green #56AE57 ΔE 0.031
- Medium Green #39AD48 ΔE 0.034
- Avocado Green #87A922 ΔE 0.036
Use #66AA33 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.