#3FB539
Closest named color: Leafy Green (#51B73B). oklch(68.2% 0.194 142.4), rgb(63, 181, 57).
Aa
Black text reads best on this color (7.87:1).
About this color
#3FB539 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.194 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.015 away. Black text reads best on it, at 7.87:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.194) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 7.87:1 |
| White text | 2.66:1 |
Values
| HEX | #3FB539 |
| RGB | rgb(63, 181, 57) |
| HSL | hsl(117, 52%, 47%) |
| OKLCH | oklch(68.2% 0.194 142.4) |
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 #3FB539 | 2.66:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #3FB539 | 7.87:1 | AAA | Lc 52.6 | Large or bold text, headings |
| #3FB539 text on white | 2.66:1 | Fails | Lc 51.4 | Large or bold text, headings |
| #3FB539 text on black | 7.87:1 | AAA | Lc -50.5 | 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
#DDF0DB
oklch(93.5% 0.034 142.6)
-
Step 200
200
#C0E5BC
oklch(88.4% 0.068 142.4)
-
Step 300
300
#92D58C
oklch(81% 0.121 142.4)
-
Step 400
400 (this color)
#3FB539
oklch(68.2% 0.194 142.4)
-
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
#017600
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)
#3FB539 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) | #B9A427 | 0.137 |
| Deuteranopia (no green cones) | #AB9B45 | 0.137 |
| Tritanopia (no blue cones) | #26B09C | 0.124 |
| Achromatopsia (no color) | #9E9E9E | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FB539
#3FB539
oklch(68.2% 0.194 142.4)
- #CF68DE
#CF68DE
oklch(68.2% 0.195 322.4)
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 #3FB539, closest first.
No curated palette has a color within ΔE 0.04 of #3FB539.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.015
- Shamrock #01B44C ΔE 0.023
- Grass #5CAC2D ΔE 0.029
- Medium Green #39AD48 ΔE 0.030
- Shamrock Green #02C14D ΔE 0.034
- Leaf Green #5CA904 ΔE 0.036
- Frog Green #58BC08 ΔE 0.036
- Kelly Green #02AB2E ΔE 0.040
Use #3FB539 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.