#31A040
Closest named color: Grass Green (#3F9B0B). oklch(62.3% 0.168 145.3), rgb(49, 160, 64).
Aa
Black text reads best on this color (6.23:1).
About this color
#31A040 is a medium-light, vivid green. In OKLCH its lightness is 62%, its chroma 0.168 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.031 away. Black text reads best on it, at 6.23:1.
| Hue family | Greens |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.168) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 6.23:1 |
| White text | 3.36:1 |
Values
| HEX | #31A040 |
| RGB | rgb(49, 160, 64) |
| HSL | hsl(128, 53%, 41%) |
| OKLCH | oklch(62.3% 0.168 145.3) |
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 #31A040 | 3.36:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #31A040 | 6.23:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #31A040 text on white | 3.36:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #31A040 text on black | 6.23:1 | AA | Lc -41.0 | 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
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#E0EEE0
oklch(93.5% 0.024 145.4)
-
Step 200
200
#C7E2C7
oklch(88.6% 0.046 145.2)
-
Step 300
300
#9FCFA1
oklch(80.8% 0.081 145.8)
-
Step 400
400
#67B66C
oklch(70.7% 0.132 145.4)
-
Step 500
500 (this color)
#31A040
oklch(62.3% 0.168 145.3)
-
Step 600
600
#008C26
oklch(55.6% 0.174 145.3)
-
Step 700
700
#00761F
oklch(49.2% 0.153 145.3)
-
Step 800
800
#006118
oklch(42.8% 0.133 145.4)
-
Step 900
900
#0B5017
oklch(37.8% 0.11 145.3)
-
Step 950
950
#0B2F0F
oklch(27.1% 0.069 145.2)
#31A040 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) | #A39136 | 0.128 |
| Deuteranopia (no green cones) | #958848 | 0.126 |
| Tritanopia (no blue cones) | #089C8B | 0.102 |
| Achromatopsia (no color) | #8C8C8C | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31A040
#31A040
oklch(62.3% 0.168 145.3)
- #B85DBD
#B85DBD
oklch(62.2% 0.168 325.4)
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 #31A040, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.031
- Grassy Green #419C03 ΔE 0.032
- Mid Green #50A747 ΔE 0.033
- Medium Green #39AD48 ΔE 0.039
- Kelly Green #02AB2E ΔE 0.041
- Irish Green #019529 ΔE 0.043
- Kelley Green #009337 ΔE 0.045
- Muted Green #5FA052 ΔE 0.045
Use #31A040 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.