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Film Light Leak
Warm light leaks bleed in from the edge of a dark frame like the end of a 35mm roll: a red flare blooms, an amber one follows, both fade, the frame dips and a flash marks the next frame.
Also known as: light leak css, film light leak effect, analog film burn background, 35mm light leak animation.
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Customizing this snippet
- Color: set
--bgx-coloron the element or a parent. Currently previewing#3b82f6. - Pattern scale: set
--bgx-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.