#3FC266
Closest named color: Algae Green (#21C36F). oklch(72.2% 0.173 149.5), rgb(63, 194, 102).
Aa
Black text reads best on this color (9.11:1).
About this color
#3FC266 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.173 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.013 away. Black text reads best on it, at 9.11:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.11:1 |
| White text | 2.30:1 |
Values
| HEX | #3FC266 |
| RGB | rgb(63, 194, 102) |
| HSL | hsl(138, 52%, 50%) |
| OKLCH | oklch(72.2% 0.173 149.5) |
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 #3FC266 | 2.30:1 | Fails | Lc -49.8 | Large or bold text, headings |
| Black text on #3FC266 | 9.11:1 | AAA | Lc 59.0 | Large or bold text, headings |
| #3FC266 text on white | 2.30:1 | Fails | Lc 45.0 | Non-text elements, placeholder text |
| #3FC266 text on black | 9.11:1 | AAA | Lc -57.1 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DCF0DF
oklch(93.6% 0.031 149.8)
-
Step 200
200
#BEE5C4
oklch(88.5% 0.061 149.4)
-
Step 300
300
#8DD49B
oklch(80.8% 0.107 149.7)
-
Step 400
400 (this color)
#3FC266
oklch(72.2% 0.173 149.5)
-
Step 500
500
#00A549
oklch(63.1% 0.176 149.5)
-
Step 600
600
#008B3C
oklch(55.6% 0.155 149.4)
-
Step 700
700
#007532
oklch(49.1% 0.137 149.6)
-
Step 800
800
#006027
oklch(42.7% 0.12 149.3)
-
Step 900
900
#005020
oklch(37.7% 0.105 149.6)
-
Step 950
950
#003010
oklch(27% 0.075 149.4)
#3FC266 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) | #C3B25F | 0.141 |
| Deuteranopia (no green cones) | #B3A66C | 0.140 |
| Tritanopia (no blue cones) | #00BEAC | 0.097 |
| Achromatopsia (no color) | #ABABAB | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FC266
#3FC266
oklch(72.2% 0.173 149.5)
- #DF79D9
#DF79D9
oklch(72.2% 0.173 329.4)
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 #3FC266, closest first.
No curated palette has a color within ΔE 0.04 of #3FC266.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.013
- Dark Mint #48C072 ΔE 0.019
- Dark Mint Green #20C073 ΔE 0.020
- Cool Green #33B864 ΔE 0.031
- Shamrock Green #02C14D ΔE 0.035
- Seaweed #18D17B ΔE 0.041
- Leafy Green #51B73B ΔE 0.043
- Greenblue #23C48B ΔE 0.044
Use #3FC266 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.