#66AE55
Closest named color: Dark Pastel Green (#56AE57). oklch(68.3% 0.143 139.8), rgb(102, 174, 85).
Aa
Black text reads best on this color (7.75:1).
About this color
#66AE55 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.143 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.014 away. Black text reads best on it, at 7.75:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #66AE55 |
| RGB | rgb(102, 174, 85) |
| HSL | hsl(109, 35%, 51%) |
| OKLCH | oklch(68.3% 0.143 139.8) |
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 #66AE55 | 2.70:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #66AE55 | 7.75:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #66AE55 text on white | 2.70:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #66AE55 text on black | 7.75:1 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E1EEDE
oklch(93.5% 0.025 139.8)
-
Step 200
200
#C9E2C3
oklch(88.6% 0.05 139.6)
-
Step 300
300
#A2CF98
oklch(80.8% 0.089 140)
-
Step 400
400 (this color)
#66AE55
oklch(68.3% 0.143 139.8)
-
Step 500
500
#41A225
oklch(63% 0.183 139.8)
-
Step 600
600
#2A8A00
oklch(55.5% 0.178 139.8)
-
Step 700
700
#227400
oklch(49% 0.157 139.8)
-
Step 800
800
#1A5F00
oklch(42.6% 0.136 139.8)
-
Step 900
900
#155002
oklch(37.8% 0.12 140)
-
Step 950
950
#0F2F06
oklch(27.1% 0.076 139.5)
#66AE55 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) | #B2A14D | 0.098 |
| Deuteranopia (no green cones) | #A89B5B | 0.098 |
| Tritanopia (no blue cones) | #60A99A | 0.097 |
| Achromatopsia (no color) | #9D9D9D | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66AE55
#66AE55
oklch(68.3% 0.143 139.8)
- #BF7AD0
#BF7AD0
oklch(68.3% 0.143 319.5)
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 #66AE55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.014
- Fern #63A950 ΔE 0.015
- Boring Green #63B365 ΔE 0.019
- Asparagus #77AB56 ΔE 0.019
- Algae #54AC68 ΔE 0.027
- Leaf #71AA34 ΔE 0.028
- Off Green #6BA353 ΔE 0.031
- Mid Green #50A747 ΔE 0.034
Use #66AE55 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.