#3FA31F
Closest named color: Grassy Green (#419C03). oklch(63.2% 0.188 139.7), rgb(63, 163, 31).
Aa
Black text reads best on this color (6.47:1).
About this color
#3FA31F is a medium-light, vivid green. In OKLCH its lightness is 63%, its chroma 0.188 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grassy Green (#419C03), ΔE 0.020 away. Black text reads best on it, at 6.47:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.188) |
| Temperature | in between |
| Nearest name | Grassy Green (#419C03) |
| Black text | 6.47:1 |
| White text | 3.24:1 |
Values
| HEX | #3FA31F |
| RGB | rgb(63, 163, 31) |
| HSL | hsl(105, 68%, 38%) |
| OKLCH | oklch(63.2% 0.188 139.7) |
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 #3FA31F | 3.24:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #3FA31F | 6.47:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #3FA31F text on white | 3.24:1 | AA large text | Lc 59.3 | Large or bold text, headings |
| #3FA31F text on black | 6.47:1 | AA | Lc -42.4 | Non-text elements, placeholder text |
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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E1EFDE
oklch(93.7% 0.027 140.2)
-
Step 200
200
#C8E2C2
oklch(88.5% 0.051 139.8)
-
Step 300
300
#A2D097
oklch(81% 0.092 139.6)
-
Step 400
400
#6CB65A
oklch(70.6% 0.147 139.7)
-
Step 500
500 (this color)
#3FA31F
oklch(63.2% 0.188 139.7)
-
Step 600
600
#2B8A00
oklch(55.6% 0.178 139.6)
-
Step 700
700
#237400
oklch(49% 0.157 139.6)
-
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
#0E2F05
oklch(27% 0.078 139.6)
#3FA31F 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) | #A89400 | 0.125 |
| Deuteranopia (no green cones) | #9C8C2F | 0.125 |
| Tritanopia (no blue cones) | #329D8B | 0.128 |
| Achromatopsia (no color) | #8F8F8F | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA31F
#3FA31F
oklch(63.2% 0.188 139.7)
- #B95CCF
#B95CCF
oklch(63.1% 0.188 319.6)
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 #3FA31F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grassy Green #419C03 ΔE 0.020
- Grass Green #3F9B0B ΔE 0.023
- Kelly Green #02AB2E ΔE 0.026
- Leaf Green #5CA904 ΔE 0.032
- Medium Green #39AD48 ΔE 0.036
- Mid Green #50A747 ΔE 0.037
- Grass #5CAC2D ΔE 0.039
- Shamrock #01B44C ΔE 0.050
Use #3FA31F 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.