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Liquid Mercury Rim
Beads of liquid chrome run the rim at different speeds, merging when they meet and necking apart again. A goo filter lights the metal, and a crisp highlight rides each bead above it.
Also known as: gooey border css, liquid metal border, mercury blob animation, metaball border css.
Liquid metal
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Everything you see above is live. Basic and Pro include every premium piece, with the HTML and CSS ready to copy, plus the Tailwind version where there is one and Motions in Claude Code on Pro.
Customizing this snippet
- Color: set
--bdr-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--bdr-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.