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Thermochromic Heat Button
A glossy mood-ring pill. Hover warms it outward from the spot under the pointer, from a cool shade of your accent through magenta to amber. Leave and it cools from the edges in, a little slower.
Also known as: mood ring button, heat sensitive button css, color changing hover button, thermal hover effect.
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Unlock the HTML and CSS
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
--btn-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--btn-size. Every other dimension is inem, so the whole thing scales together. Currently previewing18px. - 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.