#3F9821
Closest named color: Grass Green (#3F9B0B). oklch(60.2% 0.174 139.3), rgb(63, 152, 33).
Aa
Black text reads best on this color (5.72:1).
About this color
#3F9821 is a medium-dark, vivid green. In OKLCH its lightness is 60%, its chroma 0.174 and its hue 139°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.014 away. Black text reads best on it, at 5.72:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 5.72:1 |
| White text | 3.66:1 |
Values
| HEX | #3F9821 |
| RGB | rgb(63, 152, 33) |
| HSL | hsl(105, 64%, 36%) |
| OKLCH | oklch(60.2% 0.174 139.3) |
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 #3F9821 | 3.66:1 | AA large text | Lc -69.4 | Content text, not long reading |
| Black text on #3F9821 | 5.72:1 | AA | Lc 40.2 | Non-text elements, placeholder text |
| #3F9821 text on white | 3.66:1 | AA large text | Lc 63.9 | Content text, not long reading |
| #3F9821 text on black | 5.72:1 | AA | Lc -37.8 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#CAE1C4
oklch(88.5% 0.046 139.2)
-
Step 300
300
#A4CE9A
oklch(80.8% 0.084 139.7)
-
Step 400
400
#72B560
oklch(70.8% 0.136 139.3)
-
Step 500
500 (this color)
#3F9821
oklch(60.2% 0.174 139.3)
-
Step 600
600
#2E8A00
oklch(55.7% 0.176 139.3)
-
Step 700
700
#257400
oklch(49.1% 0.156 139.3)
-
Step 800
800
#1D5F00
oklch(42.7% 0.135 139.3)
-
Step 900
900
#1A4F07
oklch(37.7% 0.114 139.4)
-
Step 950
950
#112E08
oklch(26.9% 0.071 139.2)
#3F9821 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) | #9D8A02 | 0.115 |
| Deuteranopia (no green cones) | #91832E | 0.114 |
| Tritanopia (no blue cones) | #359382 | 0.118 |
| Achromatopsia (no color) | #858585 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9821
#3F9821
oklch(60.2% 0.174 139.3)
- #AC58C1
#AC58C1
oklch(60.2% 0.174 319.3)
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 #3F9821, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.014
- Grassy Green #419C03 ΔE 0.018
- Irish Green #019529 ΔE 0.028
- True Green #089404 ΔE 0.033
- Kelley Green #009337 ΔE 0.035
- Emerald Green #028F1E ΔE 0.041
- Sap Green #5C8B15 ΔE 0.042
- Forest Green #228B22 ΔE 0.046
Use #3F9821 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.