#3F9937
Closest named color: Grass Green (#3F9B0B). oklch(60.7% 0.16 142), rgb(63, 153, 55).
Aa
Black text reads best on this color (5.82:1).
About this color
#3F9937 is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.160 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.028 away. Black text reads best on it, at 5.82:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #3F9937 |
| RGB | rgb(63, 153, 55) |
| HSL | hsl(115, 47%, 41%) |
| OKLCH | oklch(60.7% 0.16 142) |
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 #3F9937 | 3.60:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #3F9937 | 5.82:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #3F9937 text on white | 3.60:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #3F9937 text on black | 5.82:1 | AA | Lc -38.4 | 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
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE0
oklch(93.6% 0.023 141.2)
-
Step 200
200
#CAE1C6
oklch(88.5% 0.044 141)
-
Step 300
300
#A4CE9F
oklch(80.9% 0.079 142.1)
-
Step 400
400
#71B46A
oklch(70.7% 0.125 142)
-
Step 500
500 (this color)
#3F9937
oklch(60.7% 0.16 142)
-
Step 600
600
#218B18
oklch(55.7% 0.174 142)
-
Step 700
700
#107605
oklch(49.2% 0.163 141.9)
-
Step 800
800
#13600D
oklch(42.8% 0.134 142.1)
-
Step 900
900
#194F15
oklch(37.8% 0.105 142.2)
-
Step 950
950
#112E0E
oklch(27% 0.065 141.8)
#3F9937 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) | #9D8B2C | 0.114 |
| Deuteranopia (no green cones) | #91843F | 0.113 |
| Tritanopia (no blue cones) | #319484 | 0.104 |
| Achromatopsia (no color) | #878787 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9937
#3F9937
oklch(60.7% 0.16 142)
- #AD5DBA
#AD5DBA
oklch(60.7% 0.159 321.9)
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 #3F9937, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.028
- Grassy Green #419C03 ΔE 0.031
- Irish Green #019529 ΔE 0.034
- Kelley Green #009337 ΔE 0.034
- Sap Green #5C8B15 ΔE 0.043
- True Green #089404 ΔE 0.045
- Fern Green #548D44 ΔE 0.045
- Mid Green #50A747 ΔE 0.046
Use #3F9937 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.