Can I paste the generated CSS as is?
Yes. Copy the background, box-shadow and other declarations onto your element. No vendor prefixes are emitted: linear-gradient, radial-gradient and box-shadow have been stable in every major browser for years, while conic-gradient is a more recent addition.
Can colour stop positions be omitted?
CSS allows it and spaces the stops evenly when you do. This tool always writes the percentage so the intent is explicit; delete the numbers after pasting if you would rather rely on the default spacing.
How many box-shadow layers can I stack?
CSS has no limit – shadows are just a comma-separated list. This tool caps it at five to keep the controls manageable. Natural-looking depth usually comes from two or three layers: a small dark one close to the element and a large soft one behind it.
Do the patterns use images?
No. Stripes come from repeating-linear-gradient, dots from radial-gradient plus background-size, and the checkerboard from conic-gradient. Nothing extra is downloaded, nothing blurs when scaled, and the colours stay editable in code.