#3FC66D
Closest named color: Algae Green (#21C36F). oklch(73.3% 0.172 150.7), rgb(63, 198, 109).
Aa
Black text reads best on this color (9.50:1).
About this color
#3FC66D is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.172 and its hue 151°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.016 away. Black text reads best on it, at 9.50:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.50:1 |
| White text | 2.20:1 |
Values
| HEX | #3FC66D |
| RGB | rgb(63, 198, 109) |
| HSL | hsl(140, 54%, 51%) |
| OKLCH | oklch(73.3% 0.172 150.7) |
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 #3FC66D | 2.20:1 | Fails | Lc -47.8 | Large or bold text, headings |
| Black text on #3FC66D | 9.50:1 | AAA | Lc 60.9 | Content text, not long reading |
| #3FC66D text on white | 2.20:1 | Fails | Lc 43.1 | Non-text elements, placeholder text |
| #3FC66D text on black | 9.50:1 | AAA | Lc -59.1 | 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
#EFF8F1
oklch(97% 0.013 152.6)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BEE5C5
oklch(88.5% 0.06 150.3)
-
Step 300
300
#8CD59D
oklch(81% 0.108 150.8)
-
Step 400
400 (this color)
#3FC66D
oklch(73.3% 0.172 150.7)
-
Step 500
500
#00A54F
oklch(63.2% 0.171 150.8)
-
Step 600
600
#008B41
oklch(55.7% 0.151 150.7)
-
Step 700
700
#007536
oklch(49.2% 0.133 150.8)
-
Step 800
800
#00602B
oklch(42.8% 0.116 150.8)
-
Step 900
900
#005023
oklch(37.7% 0.102 150.9)
-
Step 950
950
#003012
oklch(27% 0.073 150.7)
#3FC66D 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) | #C7B566 | 0.144 |
| Deuteranopia (no green cones) | #B6AA73 | 0.141 |
| Tritanopia (no blue cones) | #00C3B1 | 0.094 |
| Achromatopsia (no color) | #AEAEAE | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FC66D
#3FC66D
oklch(73.3% 0.172 150.7)
- #E47CDA
#E47CDA
oklch(73.3% 0.172 330.8)
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 #3FC66D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.016
- Dark Mint #48C072 ΔE 0.020
- Dark Mint Green #20C073 ΔE 0.025
- Seaweed #18D17B ΔE 0.030
- Greenblue #23C48B ΔE 0.040
- Soft Green #6FC276 ΔE 0.040
- Cool Green #33B864 ΔE 0.041
- Shamrock Green #02C14D ΔE 0.043
Use #3FC66D 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.