#66BF60
Closest named color: Turtle Green (#75B84F). oklch(72.7% 0.157 142.5), rgb(102, 191, 96).
Aa
Black text reads best on this color (9.18:1).
About this color
#66BF60 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.157 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Turtle Green (#75B84F), ΔE 0.022 away. Black text reads best on it, at 9.18:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.157) |
| Temperature | in between |
| Nearest name | Turtle Green (#75B84F) |
| Black text | 9.18:1 |
| White text | 2.28:1 |
Values
| HEX | #66BF60 |
| RGB | rgb(102, 191, 96) |
| HSL | hsl(116, 43%, 56%) |
| OKLCH | oklch(72.7% 0.157 142.5) |
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 #66BF60 | 2.28:1 | Fails | Lc -49.7 | Large or bold text, headings |
| Black text on #66BF60 | 9.18:1 | AAA | Lc 59.1 | Large or bold text, headings |
| #66BF60 text on white | 2.28:1 | Fails | Lc 44.9 | Non-text elements, placeholder text |
| #66BF60 text on black | 9.18:1 | AAA | Lc -57.3 | 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
#DFEFDE
oklch(93.6% 0.028 143.7)
-
Step 200
200
#C5E3C2
oklch(88.5% 0.055 142.6)
-
Step 300
300
#9CD197
oklch(80.9% 0.097 142.5)
-
Step 400
400 (this color)
#66BF60
oklch(72.7% 0.157 142.5)
-
Step 500
500
#21A51D
oklch(63% 0.2 142.5)
-
Step 600
600
#008C01
oklch(55.5% 0.188 142.5)
-
Step 700
700
#007601
oklch(49% 0.166 142.6)
-
Step 800
800
#006100
oklch(42.7% 0.145 142.5)
-
Step 900
900
#005100
oklch(37.7% 0.128 142.5)
-
Step 950
950
#063005
oklch(27.1% 0.083 142.5)
#66BF60 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) | #C3B058 | 0.115 |
| Deuteranopia (no green cones) | #B6A866 | 0.113 |
| Tritanopia (no blue cones) | #5CBAA9 | 0.101 |
| Achromatopsia (no color) | #ABABAB | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BF60
#66BF60
oklch(72.7% 0.157 142.5)
- #D582E0
#D582E0
oklch(72.7% 0.158 322.7)
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 #66BF60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turtle Green #75B84F ΔE 0.022
- Dark Mint #48C072 ΔE 0.026
- Soft Green #6FC276 ΔE 0.028
- Boring Green #63B365 ΔE 0.037
- Algae Green #21C36F ΔE 0.037
- Dark Mint Green #20C073 ΔE 0.040
- Cool Green #33B864 ΔE 0.043
- Leafy Green #51B73B ΔE 0.046
Use #66BF60 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.