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Sweep 27 Oct 2026 · 19:04Z Build v2.1.312 531 read Stable v2.1.308 Latest v2.1.312 Next v2.1.312 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.311 ·

A UI option now checks the backgroundColor value it is given

A display option now accepts backgroundColor only as a theme colour name, a raw colour or "transparent"

Under the hood Internal Changes
JSON All of v2.1.311
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Terminal UIArea: what it touches
Internal ChangesKind: in v2.1.311,
Internal ChangesSection of the release

Unclear Where a reader would set this option is not stated.

What

Claude Code now checks a backgroundColor option used for drawing part of the interface. It accepts a theme colour name, a raw colour or "transparent". Any other value is rejected with a message listing those three choices.

Why

This appears to be a new option for interface pieces drawn by plugins.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhere a reader would set this option is not stated.

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