#66BF50
Closest named color: Turtle Green (#75B84F). oklch(72.5% 0.171 139.8), rgb(102, 191, 80).
Aa
Black text reads best on this color (9.13:1).
About this color
#66BF50 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.171 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.023 away. Black text reads best on it, at 9.13:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 9.13:1 |
| White text | 2.29:1 |
Values
| HEX | #66BF50 |
| RGB | rgb(102, 191, 80) |
| HSL | hsl(108, 46%, 53%) |
| OKLCH | oklch(72.5% 0.171 139.8) |
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 #66BF50 | 2.29:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #66BF50 | 9.13:1 | AAA | Lc 58.9 | Large or bold text, headings |
| #66BF50 text on white | 2.29:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #66BF50 text on black | 9.13:1 | AAA | Lc -57.0 | 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
#DFEFDC
oklch(93.5% 0.03 140.8)
-
Step 200
200
#C5E3BE
oklch(88.4% 0.059 139.8)
-
Step 300
300
#9CD28F
oklch(80.9% 0.108 139.6)
-
Step 400
400 (this color)
#66BF50
oklch(72.5% 0.171 139.8)
-
Step 500
500
#34A400
oklch(63% 0.202 139.7)
-
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
#155000
oklch(37.8% 0.121 139.7)
-
Step 950
950
#093000
oklch(27.1% 0.087 139.7)
#66BF50 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) | #C4B045 | 0.116 |
| Deuteranopia (no green cones) | #B8A858 | 0.116 |
| Tritanopia (no blue cones) | #5EB9A7 | 0.116 |
| Achromatopsia (no color) | #ABABAB | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BF50
#66BF50
oklch(72.5% 0.171 139.8)
- #D47FE8
#D47FE8
oklch(72.5% 0.171 319.8)
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 #66BF50, closest first.
No curated palette has a color within ΔE 0.04 of #66BF50.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.023
- Leafy Green #51B73B ΔE 0.035
- Dark Mint #48C072 ΔE 0.038
- Dark Lime Green #7EBD01 ΔE 0.040
- Apple #6ECB3C ΔE 0.042
- Dark Lime #84B701 ΔE 0.042
- Algae Green #21C36F ΔE 0.043
- Soft Green #6FC276 ΔE 0.043
Use #66BF50 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.