#509B1F
Closest named color: Grass Green (#3F9B0B). oklch(61.7% 0.17 136.3), rgb(80, 155, 31).
Aa
Black text reads best on this color (6.04:1).
About this color
#509B1F is a medium-dark, vivid green. In OKLCH its lightness is 62%, its chroma 0.170 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.018 away. Black text reads best on it, at 6.04:1.
| Hue family | Greens |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 6.04:1 |
| White text | 3.47:1 |
Values
| HEX | #509B1F |
| RGB | rgb(80, 155, 31) |
| HSL | hsl(96, 67%, 36%) |
| OKLCH | oklch(61.7% 0.17 136.3) |
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 #509B1F | 3.47:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #509B1F | 6.04:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #509B1F text on white | 3.47:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #509B1F text on black | 6.04:1 | AA | Lc -39.7 | 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
#E3EEDE
oklch(93.6% 0.024 135.7)
-
Step 200
200
#CCE1C3
oklch(88.6% 0.046 136.2)
-
Step 300
300
#A8CD98
oklch(80.8% 0.083 136.4)
-
Step 400
400
#79B35C
oklch(70.6% 0.133 136.1)
-
Step 500
500 (this color)
#509B1F
oklch(61.7% 0.17 136.3)
-
Step 600
600
#3F8800
oklch(55.7% 0.167 136.3)
-
Step 700
700
#347200
oklch(49.1% 0.147 136.3)
-
Step 800
800
#295D00
oklch(42.5% 0.127 136.3)
-
Step 900
900
#224E02
oklch(37.7% 0.111 136.3)
-
Step 950
950
#152E06
oklch(27.1% 0.071 136)
#509B1F 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) | #A18D00 | 0.106 |
| Deuteranopia (no green cones) | #97872D | 0.106 |
| Tritanopia (no blue cones) | #4C9584 | 0.122 |
| Achromatopsia (no color) | #8A8A8A | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509B1F
#509B1F
oklch(61.7% 0.17 136.3)
- #AD5FC9
#AD5FC9
oklch(61.8% 0.171 316.4)
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 #509B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.018
- Grassy Green #419C03 ΔE 0.018
- Mid Green #50A747 ΔE 0.041
- Dark Yellow Green #728F02 ΔE 0.045
- Sap Green #5C8B15 ΔE 0.045
- Leaf Green #5CA904 ΔE 0.046
- Olive Drab #6B8E23 ΔE 0.046
- Irish Green #019529 ΔE 0.046
Use #509B1F 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.