#3F9D01
Closest named color: Grassy Green (#419C03). oklch(61.5% 0.19 138.1), rgb(63, 157, 1).
Aa
Black text reads best on this color (6.03:1).
About this color
#3F9D01 is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.190 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grassy Green (#419C03), ΔE 0.003 away. Black text reads best on it, at 6.03:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.190) |
| Temperature | in between |
| Nearest name | Grassy Green (#419C03) |
| Black text | 6.03:1 |
| White text | 3.47:1 |
Values
| HEX | #3F9D01 |
| RGB | rgb(63, 157, 1) |
| HSL | hsl(96, 99%, 31%) |
| OKLCH | oklch(61.5% 0.19 138.1) |
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 #3F9D01 | 3.47:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #3F9D01 | 6.03:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #3F9D01 text on white | 3.47:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #3F9D01 text on black | 6.03:1 | AA | Lc -39.8 | 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
#E1EEDD
oklch(93.5% 0.026 138.3)
-
Step 200
200
#C9E2C1
oklch(88.6% 0.052 138.1)
-
Step 300
300
#A3CF95
oklch(80.8% 0.092 138.3)
-
Step 400
400
#6FB656
oklch(70.7% 0.149 138.2)
-
Step 500
500 (this color)
#3F9D01
oklch(61.5% 0.19 138.1)
-
Step 600
600
#368900
oklch(55.6% 0.172 138)
-
Step 700
700
#2C7300
oklch(49.1% 0.152 138.1)
-
Step 800
800
#235E00
oklch(42.6% 0.131 138)
-
Step 900
900
#1C4F00
oklch(37.8% 0.117 138)
-
Step 950
950
#102F03
oklch(27.1% 0.079 138)
#3F9D01 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) | #A28E00 | 0.124 |
| Deuteranopia (no green cones) | #978720 | 0.121 |
| Tritanopia (no blue cones) | #369785 | 0.133 |
| Achromatopsia (no color) | #898989 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9D01
#3F9D01
oklch(61.5% 0.19 138.1)
- #B257CD
#B257CD
oklch(61.5% 0.19 317.9)
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 #3F9D01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grassy Green #419C03 ΔE 0.003
- Grass Green #3F9B0B ΔE 0.007
- True Green #089404 ΔE 0.040
- Kelly Green #02AB2E ΔE 0.040
- Irish Green #019529 ΔE 0.041
- Leaf Green #5CA904 ΔE 0.046
- Mid Green #50A747 ΔE 0.051
- Kelley Green #009337 ΔE 0.051
Use #3F9D01 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.