#3F9039
Closest named color: Fern Green (#548D44). oklch(58.3% 0.147 142.2), rgb(63, 144, 57).
Aa
Black text reads best on this color (5.25:1).
About this color
#3F9039 is a medium-dark, vivid green. In OKLCH its lightness is 58%, its chroma 0.147 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.027 away. Black text reads best on it, at 5.25:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #3F9039 |
| RGB | rgb(63, 144, 57) |
| HSL | hsl(116, 43%, 39%) |
| OKLCH | oklch(58.3% 0.147 142.2) |
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 #3F9039 | 3.99:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #3F9039 | 5.25:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #3F9039 text on white | 3.99:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #3F9039 text on black | 5.25:1 | AA | Lc -34.7 | 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 600.
-
Step 50
50
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E3EDE2
oklch(93.6% 0.018 142.8)
-
Step 200
200
#CCE0CA
oklch(88.6% 0.037 142.7)
-
Step 300
300
#A9CCA5
oklch(80.9% 0.066 142.2)
-
Step 400
400
#79B174
oklch(70.6% 0.105 142.5)
-
Step 500
500
#559E4E
oklch(63.2% 0.136 142)
-
Step 600
600 (this color)
#3F9039
oklch(58.3% 0.147 142.2)
-
Step 700
700
#287323
oklch(49.1% 0.136 142.3)
-
Step 800
800
#235E1F
oklch(42.8% 0.113 142.3)
-
Step 900
900
#224D1F
oklch(37.7% 0.088 142.4)
-
Step 950
950
#152D13
oklch(27% 0.055 142.3)
#3F9039 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) | #938430 | 0.104 |
| Deuteranopia (no green cones) | #897D40 | 0.104 |
| Tritanopia (no blue cones) | #338C7D | 0.094 |
| Achromatopsia (no color) | #7F7F7F | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9039
#3F9039
oklch(58.3% 0.147 142.2)
- #A35AAE
#A35AAE
oklch(58.4% 0.146 322.2)
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 #3F9039, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.027
- Kelley Green #009337 ΔE 0.027
- Sap Green #5C8B15 ΔE 0.031
- Forest Green #228B22 ΔE 0.033
- Mossy Green #638B27 ΔE 0.035
- Light Forest Green #4F9153 ΔE 0.036
- Irish Green #019529 ΔE 0.036
- Moss Green #658B38 ΔE 0.039
Use #3F9039 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.