#399F40
Closest named color: Grass Green (#3F9B0B). oklch(62.2% 0.163 144.4), rgb(57, 159, 64).
Aa
Black text reads best on this color (6.20:1).
About this color
#399F40 is a medium-light, vivid green. In OKLCH its lightness is 62%, its chroma 0.163 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.032 away. Black text reads best on it, at 6.20:1.
| Hue family | Greens |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 6.20:1 |
| White text | 3.38:1 |
Values
| HEX | #399F40 |
| RGB | rgb(57, 159, 64) |
| HSL | hsl(124, 47%, 42%) |
| OKLCH | oklch(62.2% 0.163 144.4) |
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 #399F40 | 3.38:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #399F40 | 6.20:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #399F40 text on white | 3.38:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #399F40 text on black | 6.20:1 | AA | Lc -40.8 | 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
#F1F7F1
oklch(97% 0.01 145.5)
-
Step 100
100
#E1EEE0
oklch(93.6% 0.023 143.4)
-
Step 200
200
#C8E1C7
oklch(88.4% 0.044 144.2)
-
Step 300
300
#A1CFA1
oklch(81% 0.08 144.8)
-
Step 400
400
#6BB56C
oklch(70.6% 0.128 144.4)
-
Step 500
500 (this color)
#399F40
oklch(62.2% 0.163 144.4)
-
Step 600
600
#028C1F
oklch(55.6% 0.178 144.4)
-
Step 700
700
#007618
oklch(49.1% 0.157 144.4)
-
Step 800
800
#006112
oklch(42.8% 0.137 144.4)
-
Step 900
900
#124F17
oklch(37.6% 0.106 144.2)
-
Step 950
950
#0D2F0F
oklch(27.1% 0.068 144.4)
#399F40 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) | #A29136 | 0.121 |
| Deuteranopia (no green cones) | #958848 | 0.121 |
| Tritanopia (no blue cones) | #219B8A | 0.101 |
| Achromatopsia (no color) | #8C8C8C | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399F40
#399F40
oklch(62.2% 0.163 144.4)
- #B65FBD
#B65FBD
oklch(62.2% 0.164 324.5)
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 #399F40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.032
- Mid Green #50A747 ΔE 0.032
- Grassy Green #419C03 ΔE 0.033
- Medium Green #39AD48 ΔE 0.040
- Muted Green #5FA052 ΔE 0.041
- Irish Green #019529 ΔE 0.044
- Kelly Green #02AB2E ΔE 0.045
- Kelley Green #009337 ΔE 0.045
Use #399F40 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.