#66BE56
Closest named color: Turtle Green (#75B84F). oklch(72.3% 0.165 140.7), rgb(102, 190, 86).
Aa
Black text reads best on this color (9.06:1).
About this color
#66BE56 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.165 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.019 away. Black text reads best on it, at 9.06:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.165) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 9.06:1 |
| White text | 2.31:1 |
Values
| HEX | #66BE56 |
| RGB | rgb(102, 190, 86) |
| HSL | hsl(111, 44%, 54%) |
| OKLCH | oklch(72.3% 0.165 140.7) |
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 #66BE56 | 2.31:1 | Fails | Lc -50.3 | Large or bold text, headings |
| Black text on #66BE56 | 9.06:1 | AAA | Lc 58.5 | Large or bold text, headings |
| #66BE56 text on white | 2.31:1 | Fails | Lc 45.4 | Large or bold text, headings |
| #66BE56 text on black | 9.06:1 | AAA | Lc -56.6 | 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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E0EFDD
oklch(93.6% 0.029 140.5)
-
Step 200
200
#C5E3C0
oklch(88.5% 0.057 141.1)
-
Step 300
300
#9CD192
oklch(80.8% 0.103 140.6)
-
Step 400
400 (this color)
#66BE56
oklch(72.3% 0.165 140.7)
-
Step 500
500
#2AA500
oklch(63.1% 0.206 140.7)
-
Step 600
600
#228B00
oklch(55.6% 0.182 140.6)
-
Step 700
700
#1B7500
oklch(49.1% 0.16 140.7)
-
Step 800
800
#146000
oklch(42.7% 0.14 140.7)
-
Step 900
900
#0F5000
oklch(37.7% 0.123 140.7)
-
Step 950
950
#073001
oklch(27.1% 0.087 140.7)
#66BE56 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) | #C3AF4C | 0.115 |
| Deuteranopia (no green cones) | #B7A75E | 0.116 |
| Tritanopia (no blue cones) | #5DB9A7 | 0.109 |
| Achromatopsia (no color) | #AAAAAA | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BE56
#66BE56
oklch(72.3% 0.165 140.7)
- #D380E4
#D380E4
oklch(72.4% 0.164 320.6)
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 #66BE56, closest first.
No curated palette has a color within ΔE 0.04 of #66BE56.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.019
- Dark Mint #48C072 ΔE 0.032
- Leafy Green #51B73B ΔE 0.037
- Soft Green #6FC276 ΔE 0.038
- Algae Green #21C36F ΔE 0.040
- Boring Green #63B365 ΔE 0.040
- Cool Green #33B864 ΔE 0.043
- Dark Mint Green #20C073 ΔE 0.044
Use #66BE56 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.