#3FCA6D
Closest named color: Seaweed (#18D17B). oklch(74.4% 0.177 150.3), rgb(63, 202, 109).
Aa
Black text reads best on this color (9.88:1).
About this color
#3FCA6D is a medium-light, vivid green. In OKLCH its lightness is 74%, its chroma 0.177 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed (#18D17B), ΔE 0.021 away. Black text reads best on it, at 9.88:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Seaweed (#18D17B) |
| Black text | 9.88:1 |
| White text | 2.12:1 |
Values
| HEX | #3FCA6D |
| RGB | rgb(63, 202, 109) |
| HSL | hsl(140, 57%, 52%) |
| OKLCH | oklch(74.4% 0.177 150.3) |
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 #3FCA6D | 2.12:1 | Fails | Lc -45.9 | Large or bold text, headings |
| Black text on #3FCA6D | 9.88:1 | AAA | Lc 62.7 | Content text, not long reading |
| #3FCA6D text on white | 2.12:1 | Fails | Lc 41.2 | Non-text elements, placeholder text |
| #3FCA6D text on black | 9.88:1 | AAA | Lc -61.0 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DBF0DF
oklch(93.5% 0.032 151.2)
-
Step 200
200
#BDE5C4
oklch(88.4% 0.061 150.1)
-
Step 300
300
#8AD59B
oklch(80.9% 0.111 150.5)
-
Step 400
400 (this color)
#3FCA6D
oklch(74.4% 0.177 150.3)
-
Step 500
500
#00A54D
oklch(63.1% 0.172 150.4)
-
Step 600
600
#008B40
oklch(55.7% 0.152 150.4)
-
Step 700
700
#007534
oklch(49.2% 0.135 150.2)
-
Step 800
800
#00602A
oklch(42.8% 0.117 150.4)
-
Step 900
900
#005022
oklch(37.7% 0.103 150.5)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#3FCA6D 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) | #CBB966 | 0.147 |
| Deuteranopia (no green cones) | #BAAD73 | 0.145 |
| Tritanopia (no blue cones) | #00C7B4 | 0.097 |
| Achromatopsia (no color) | #B2B2B2 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FCA6D
#3FCA6D
oklch(74.4% 0.177 150.3)
- #E97EE0
#E97EE0
oklch(74.4% 0.177 330.3)
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 #3FCA6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed #18D17B ΔE 0.021
- Algae Green #21C36F ΔE 0.026
- Dark Mint #48C072 ΔE 0.031
- Dark Mint Green #20C073 ΔE 0.036
- Soft Green #6FC276 ΔE 0.044
- Greenblue #23C48B ΔE 0.046
- Shamrock Green #02C14D ΔE 0.046
- Apple #6ECB3C ΔE 0.050
Use #3FCA6D 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.