#399C31
Closest named color: Grass Green (#3F9B0B). oklch(61.2% 0.171 142.1), rgb(57, 156, 49).
Aa
Black text reads best on this color (5.97:1).
About this color
#399C31 is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.171 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 0.019 away. Black text reads best on it, at 5.97:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #399C31 |
| RGB | rgb(57, 156, 49) |
| HSL | hsl(116, 52%, 40%) |
| OKLCH | oklch(61.2% 0.171 142.1) |
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 #399C31 | 3.51:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #399C31 | 5.97:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #399C31 text on white | 3.51:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #399C31 text on black | 5.97:1 | AA | Lc -39.4 | 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
#F1F7F1
oklch(97% 0.01 145.5)
-
Step 100
100
#E1EEDF
oklch(93.5% 0.024 141.5)
-
Step 200
200
#C8E1C5
oklch(88.4% 0.046 142.2)
-
Step 300
300
#A2CF9D
oklch(80.9% 0.084 142.2)
-
Step 400
400
#6DB566
oklch(70.6% 0.133 142.1)
-
Step 500
500 (this color)
#399C31
oklch(61.2% 0.171 142.1)
-
Step 600
600
#0F8C03
oklch(55.6% 0.186 142.1)
-
Step 700
700
#097600
oklch(49.1% 0.165 142.1)
-
Step 800
800
#076101
oklch(42.8% 0.143 142.1)
-
Step 900
900
#144F10
oklch(37.6% 0.111 142.2)
-
Step 950
950
#0E2F0B
oklch(27.1% 0.072 142)
#399C31 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) | #A08E22 | 0.121 |
| Deuteranopia (no green cones) | #94863B | 0.121 |
| Tritanopia (no blue cones) | #279786 | 0.111 |
| Achromatopsia (no color) | #898989 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399C31
#399C31
oklch(61.2% 0.171 142.1)
- #B25BC0
#B25BC0
oklch(61.3% 0.171 321.9)
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 #399C31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.019
- Grassy Green #419C03 ΔE 0.021
- Irish Green #019529 ΔE 0.033
- Kelley Green #009337 ΔE 0.038
- True Green #089404 ΔE 0.041
- Mid Green #50A747 ΔE 0.042
- Kelly Green #02AB2E ΔE 0.046
- Emerald Green #028F1E ΔE 0.049
Use #399C31 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.