#3FB139
Closest named color: Medium Green (#39AD48). oklch(67.1% 0.189 142.4), rgb(63, 177, 57).
Aa
Black text reads best on this color (7.55:1).
About this color
#3FB139 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.189 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Green (#39AD48), ΔE 0.020 away. Black text reads best on it, at 7.55:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.189) |
| Temperature | in between |
| Nearest name | Medium Green (#39AD48) |
| Black text | 7.55:1 |
| White text | 2.77:1 |
Values
| HEX | #3FB139 |
| RGB | rgb(63, 177, 57) |
| HSL | hsl(117, 51%, 46%) |
| OKLCH | oklch(67.1% 0.189 142.4) |
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 #3FB139 | 2.77:1 | Fails | Lc -58.4 | Large or bold text, headings |
| Black text on #3FB139 | 7.55:1 | AAA | Lc 50.9 | Large or bold text, headings |
| #3FB139 text on white | 2.77:1 | Fails | Lc 53.1 | Large or bold text, headings |
| #3FB139 text on black | 7.55:1 | AAA | Lc -48.7 | 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
#F0F8EF
oklch(97.1% 0.015 142.2)
-
Step 100
100
#DDF0DB
oklch(93.5% 0.034 142.6)
-
Step 200
200
#C1E5BD
oklch(88.5% 0.066 142.3)
-
Step 300
300
#93D48D
oklch(80.8% 0.118 142.4)
-
Step 400
400 (this color)
#3FB139
oklch(67.1% 0.189 142.4)
-
Step 500
500
#03A700
oklch(63.1% 0.214 142.4)
-
Step 600
600
#028C00
oklch(55.5% 0.188 142.4)
-
Step 700
700
#027600
oklch(49% 0.167 142.4)
-
Step 800
800
#016100
oklch(42.7% 0.145 142.4)
-
Step 900
900
#015100
oklch(37.7% 0.128 142.4)
-
Step 950
950
#003100
oklch(27.1% 0.092 142.5)
#3FB139 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) | #B5A129 | 0.134 |
| Deuteranopia (no green cones) | #A79744 | 0.134 |
| Tritanopia (no blue cones) | #28AC99 | 0.122 |
| Achromatopsia (no color) | #9B9B9B | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FB139
#3FB139
oklch(67.1% 0.189 142.4)
- #CA67D8
#CA67D8
oklch(67.1% 0.188 322.5)
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 #3FB139, closest first.
No curated palette has a color within ΔE 0.04 of #3FB139.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Green #39AD48 ΔE 0.020
- Shamrock #01B44C ΔE 0.021
- Grass #5CAC2D ΔE 0.022
- Leafy Green #51B73B ΔE 0.023
- Leaf Green #5CA904 ΔE 0.030
- Kelly Green #02AB2E ΔE 0.031
- Mid Green #50A747 ΔE 0.036
- Dark Pastel Green #56AE57 ΔE 0.040
Use #3FB139 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.