The Color panel shows the out-of-gamut and out-of-web warnings under its
proxy only when the colour needs them, so the panel grew and shrank with
the colour. Dragging on the spectrum's pale top edge, a colour out of
gamut added a warning, the spectrum moved down under the pointer, the
pointer then picked white (above the spectrum), the warning went away,
the spectrum moved back up: the colour flipped every frame.
The panel now keeps room for the warnings its mode can show, so its
height no longer depends on the colour.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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