#539B18
Closest named color: Grassy Green (#419C03). oklch(61.8% 0.172 135.2), rgb(83, 155, 24).
Aa
Black text reads best on this color (6.06:1).
About this color
#539B18 is a medium-dark, vivid green. In OKLCH its lightness is 62%, its chroma 0.172 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grassy Green (#419C03), ΔE 0.018 away. Black text reads best on it, at 6.06:1.
| Hue family | Greens |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Grassy Green (#419C03) |
| Black text | 6.06:1 |
| White text | 3.45:1 |
Values
| HEX | #539B18 |
| RGB | rgb(83, 155, 24) |
| HSL | hsl(93, 73%, 35%) |
| OKLCH | oklch(61.8% 0.172 135.2) |
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 #539B18 | 3.45:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #539B18 | 6.06:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #539B18 text on white | 3.45:1 | AA large text | Lc 61.8 | Content text, not long reading |
| #539B18 text on black | 6.06:1 | AA | Lc -39.9 | 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
#CCE1C2
oklch(88.6% 0.047 135.5)
-
Step 300
300
#A9CD97
oklch(80.8% 0.083 135.4)
-
Step 400
400
#7AB35A
oklch(70.7% 0.135 135.4)
-
Step 500
500 (this color)
#539B18
oklch(61.8% 0.172 135.2)
-
Step 600
600
#448700
oklch(55.7% 0.163 135.2)
-
Step 700
700
#387100
oklch(49% 0.143 135.1)
-
Step 800
800
#2D5D00
oklch(42.7% 0.125 135.1)
-
Step 900
900
#244E00
oklch(37.8% 0.111 135.4)
-
Step 950
950
#162E05
oklch(27.1% 0.071 135)
#539B18 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) | #A18E00 | 0.103 |
| Deuteranopia (no green cones) | #988829 | 0.104 |
| Tritanopia (no blue cones) | #519584 | 0.125 |
| Achromatopsia (no color) | #8A8A8A | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #539B18
#539B18
oklch(61.8% 0.172 135.2)
- #AC60CB
#AC60CB
oklch(61.9% 0.171 315.3)
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 #539B18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grassy Green #419C03 ΔE 0.018
- Grass Green #3F9B0B ΔE 0.019
- Mid Green #50A747 ΔE 0.042
- Dark Yellow Green #728F02 ΔE 0.044
- Leaf Green #5CA904 ΔE 0.044
- Olive Drab #6B8E23 ΔE 0.046
- Sap Green #5C8B15 ΔE 0.046
- Irish Green #019529 ΔE 0.048
Use #539B18 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.