#66CA66
Closest named color: Soft Green (#6FC276). oklch(75.5% 0.167 143.7), rgb(102, 202, 102).
Aa
Black text reads best on this color (10.20:1).
About this color
#66CA66 is a medium-light, vivid green. In OKLCH its lightness is 76%, its chroma 0.167 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Soft Green (#6FC276), ΔE 0.035 away. Black text reads best on it, at 10.20:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.167) |
| Temperature | in between |
| Nearest name | Soft Green (#6FC276) |
| Black text | 10.20:1 |
| White text | 2.05:1 |
Values
| HEX | #66CA66 |
| RGB | rgb(102, 202, 102) |
| HSL | hsl(120, 49%, 60%) |
| OKLCH | oklch(75.5% 0.167 143.7) |
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 #66CA66 | 2.05:1 | Fails | Lc -44.4 | Non-text elements, placeholder text |
| Black text on #66CA66 | 10.20:1 | AAA | Lc 64.1 | Content text, not long reading |
| #66CA66 text on white | 2.05:1 | Fails | Lc 39.9 | Non-text elements, placeholder text |
| #66CA66 text on black | 10.20:1 | AAA | Lc -62.5 | Content text, not long reading |
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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DEEFDD
oklch(93.5% 0.03 143.8)
-
Step 200
200
#C3E4C1
oklch(88.6% 0.059 143.5)
-
Step 300
300
#97D295
oklch(80.8% 0.104 143.8)
-
Step 400
400 (this color)
#66CA66
oklch(75.5% 0.167 143.7)
-
Step 500
500
#00A71D
oklch(63.2% 0.207 143.7)
-
Step 600
600
#008C17
oklch(55.5% 0.182 143.7)
-
Step 700
700
#007612
oklch(49.1% 0.161 143.7)
-
Step 800
800
#00610D
oklch(42.7% 0.14 143.7)
-
Step 900
900
#005109
oklch(37.7% 0.123 143.7)
-
Step 950
950
#003003
oklch(26.8% 0.088 143.6)
#66CA66 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) | #CEBA5E | 0.125 |
| Deuteranopia (no green cones) | #C0B16D | 0.124 |
| Tritanopia (no blue cones) | #58C5B3 | 0.105 |
| Achromatopsia (no color) | #B5B5B5 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66CA66
#66CA66
oklch(75.5% 0.167 143.7)
- #E288EB
#E288EB
oklch(75.6% 0.166 323.7)
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 #66CA66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Green #6FC276 ΔE 0.035
- Apple #6ECB3C ΔE 0.038
- Seaweed #18D17B ΔE 0.038
- Dark Mint #48C072 ΔE 0.042
- Algae Green #21C36F ΔE 0.047
- Turtle Green #75B84F ΔE 0.048
- Fresh Green #69D84F ΔE 0.051
- Apple Green #76CD26 ΔE 0.052
Use #66CA66 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.