#3FAE18
Closest named color: Leaf Green (#5CA904). oklch(66.1% 0.203 139.7), rgb(63, 174, 24).
Aa
Black text reads best on this color (7.27:1).
About this color
#3FAE18 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.203 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leaf Green (#5CA904), ΔE 0.023 away. Black text reads best on it, at 7.27:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.203) |
| Temperature | in between |
| Nearest name | Leaf Green (#5CA904) |
| Black text | 7.27:1 |
| White text | 2.88:1 |
Values
| HEX | #3FAE18 |
| RGB | rgb(63, 174, 24) |
| HSL | hsl(104, 76%, 39%) |
| OKLCH | oklch(66.1% 0.203 139.7) |
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 #3FAE18 | 2.88:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #3FAE18 | 7.27:1 | AAA | Lc 49.4 | Large or bold text, headings |
| #3FAE18 text on white | 2.88:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #3FAE18 text on black | 7.27:1 | AAA | Lc -47.2 | 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 500.
-
Step 50
50
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E0EFDD
oklch(93.6% 0.029 140.5)
-
Step 200
200
#C7E3C0
oklch(88.6% 0.056 139.4)
-
Step 300
300
#9FD193
oklch(81% 0.1 139.6)
-
Step 400
400
#67B853
oklch(70.8% 0.159 139.7)
-
Step 500
500 (this color)
#3FAE18
oklch(66.1% 0.203 139.7)
-
Step 600
600
#2B8A00
oklch(55.6% 0.178 139.6)
-
Step 700
700
#227400
oklch(49% 0.157 139.8)
-
Step 800
800
#1B5F00
oklch(42.6% 0.136 139.6)
-
Step 900
900
#155000
oklch(37.8% 0.121 139.7)
-
Step 950
950
#0B2F02
oklch(26.9% 0.082 139.7)
#3FAE18 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) | #B39D00 | 0.136 |
| Deuteranopia (no green cones) | #A6952D | 0.135 |
| Tritanopia (no blue cones) | #2FA894 | 0.138 |
| Achromatopsia (no color) | #989898 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FAE18
#3FAE18
oklch(66.1% 0.203 139.7)
- #C660DE
#C660DE
oklch(66% 0.202 319.6)
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 #3FAE18, closest first.
No curated palette has a color within ΔE 0.04 of #3FAE18.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leaf Green #5CA904 ΔE 0.023
- Kelly Green #02AB2E ΔE 0.025
- Grass #5CAC2D ΔE 0.028
- Medium Green #39AD48 ΔE 0.034
- Shamrock #01B44C ΔE 0.035
- Leafy Green #51B73B ΔE 0.036
- Mid Green #50A747 ΔE 0.046
- Frog Green #58BC08 ΔE 0.047
Use #3FAE18 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.