#3F9904
Closest named color: Grass Green (#3F9B0B). oklch(60.4% 0.185 137.9), rgb(63, 153, 4).
Aa
Black text reads best on this color (5.76:1).
About this color
#3F9904 is a medium-dark, vivid green. In OKLCH its lightness is 60%, its chroma 0.185 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.006 away. Black text reads best on it, at 5.76:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 5.76:1 |
| White text | 3.63:1 |
Values
| HEX | #3F9904 |
| RGB | rgb(63, 153, 4) |
| HSL | hsl(96, 95%, 31%) |
| OKLCH | oklch(60.4% 0.185 137.9) |
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 #3F9904 | 3.63:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #3F9904 | 5.76:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #3F9904 text on white | 3.63:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #3F9904 text on black | 5.76:1 | AA | Lc -38.1 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDD
oklch(93.5% 0.026 136.3)
-
Step 200
200
#C9E2C1
oklch(88.6% 0.052 138.1)
-
Step 300
300
#A4CF96
oklch(80.9% 0.09 138.1)
-
Step 400
400
#71B558
oklch(70.6% 0.144 137.9)
-
Step 500
500 (this color)
#3F9904
oklch(60.4% 0.185 137.9)
-
Step 600
600
#378900
oklch(55.7% 0.172 137.9)
-
Step 700
700
#2D7300
oklch(49.1% 0.151 137.9)
-
Step 800
800
#235E00
oklch(42.6% 0.131 138)
-
Step 900
900
#1C4F00
oklch(37.8% 0.117 138)
-
Step 950
950
#112F04
oklch(27.2% 0.077 137.9)
#3F9904 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) | #9E8B00 | 0.119 |
| Deuteranopia (no green cones) | #938320 | 0.118 |
| Tritanopia (no blue cones) | #379381 | 0.129 |
| Achromatopsia (no color) | #868686 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9904
#3F9904
oklch(60.4% 0.185 137.9)
- #AD55C7
#AD55C7
oklch(60.3% 0.185 317.9)
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 #3F9904, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.006
- Grassy Green #419C03 ΔE 0.009
- True Green #089404 ΔE 0.031
- Irish Green #019529 ΔE 0.032
- Kelley Green #009337 ΔE 0.042
- Emerald Green #028F1E ΔE 0.044
- Sap Green #5C8B15 ΔE 0.048
- Kelly Green #02AB2E ΔE 0.050
Use #3F9904 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.