#3FB129
Closest named color: Grass (#5CAC2D). oklch(67% 0.199 140.9), rgb(63, 177, 41).
Aa
Black text reads best on this color (7.53:1).
About this color
#3FB129 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.199 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.026 away. Black text reads best on it, at 7.53:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.199) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.53:1 |
| White text | 2.78:1 |
Values
| HEX | #3FB129 |
| RGB | rgb(63, 177, 41) |
| HSL | hsl(110, 62%, 43%) |
| OKLCH | oklch(67% 0.199 140.9) |
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 #3FB129 | 2.78:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #3FB129 | 7.53:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #3FB129 text on white | 2.78:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #3FB129 text on black | 7.53:1 | AAA | Lc -48.6 | 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
#F0F8EE
oklch(97% 0.016 139.4)
-
Step 100
100
#DDF0DA
oklch(93.5% 0.036 141.4)
-
Step 200
200
#C1E5BA
oklch(88.5% 0.069 140.5)
-
Step 300
300
#93D588
oklch(81% 0.125 140.9)
-
Step 400
400 (this color)
#3FB129
oklch(67% 0.199 140.9)
-
Step 500
500
#28A500
oklch(63% 0.206 140.8)
-
Step 600
600
#208B00
oklch(55.6% 0.182 140.8)
-
Step 700
700
#197500
oklch(49.1% 0.161 140.9)
-
Step 800
800
#136000
oklch(42.7% 0.14 140.8)
-
Step 900
900
#0E5000
oklch(37.6% 0.123 140.9)
-
Step 950
950
#053000
oklch(27% 0.089 141)
#3FB129 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) | #B6A007 | 0.136 |
| Deuteranopia (no green cones) | #A89738 | 0.136 |
| Tritanopia (no blue cones) | #2CAB97 | 0.132 |
| Achromatopsia (no color) | #9B9B9B | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FB129
#3FB129
oklch(67% 0.199 140.9)
- #CA64DE
#CA64DE
oklch(67% 0.198 320.8)
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 #3FB129, closest first.
No curated palette has a color within ΔE 0.04 of #3FB129.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.026
- Leafy Green #51B73B ΔE 0.026
- Leaf Green #5CA904 ΔE 0.027
- Shamrock #01B44C ΔE 0.028
- Medium Green #39AD48 ΔE 0.030
- Kelly Green #02AB2E ΔE 0.030
- Frog Green #58BC08 ΔE 0.041
- Mid Green #50A747 ΔE 0.045
Use #3FB129 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.