Replace deprecated rgb_order with channel_colors

[TrevorSchirmer]

ESPHome 2026.8.0 replaces rgb_order / is_rgbw / is_wrgb with a single channel_colors key on esp32_rmt_led_strip (esphome#18474).

channel_colors takes each of R, G, B exactly once, optionally with a single W; the value is case-insensitive. No behaviour change — grb and GRB are equivalent, uppercase to match the ESPHome docs.

Summary by CodeRabbit

• Bug Fixes
  • Updated RGB LED strip color channel configuration for improved compatibility and correct color rendering.

[coderabbitai]

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⚙️ Run configuration

Configuration used: Organization UI

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Run ID: 2ead984a-4db7-441b-ad68-8bb1ed3e8d71

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ff5e613d-a934-4b4d-9d9c-2282e789390f

📥 Commits

Reviewing files that changed from the base of the PR and between 1cf2bfa and ec87df0.

📒 Files selected for processing (1)

• Integrations/ESPHome/Core.yaml

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Walkthrough

The ESPHome RGB strip configuration replaces rgb_order: grb with channel_colors: GRB.

Changes

ESPHome RGB configuration

Layer / File(s)	Summary
Update RGB channel declaration Integrations/ESPHome/Core.yaml	The RGB strip now uses channel_colors: GRB instead of rgb_order: grb.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to ec87d

This PR makes a single localized ESPHome configuration-key migration without changing behavior; no actionable merge-blocking risk remains beyond normal checks and review.

Poem

A rabbit hops by glowing green,
With red and blue in channels clean.
GRB now leads the way,
One small change brightens the day.
The strip shines on in tidy code.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: replacing the deprecated rgb_order setting with channel_colors.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch channel-colors-migration

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[bharvey88]

Verified against upstream rather than the description: channel_colors landed in ESPHome 2026.8.0 (esphome#18474), and rgb_order still validates but is marked for removal in 2027.3.0. validate_channel_colors uppercases its input and channel_colors_struct derives the same r/g/b indices, so GRB here is byte-identical to the previous grb. No behaviour change and no change to the compiled binary.

Every esp32_rmt_led_strip block in this repo is covered. I pushed one commit on top bumping min_version to 2026.8.0: devices adopted through the ESPHome dashboard track this repo at HEAD with no pinned ref, so without it an adopter on an older ESPHome would hit Unknown option channel_colors inside a file they never wrote. ESPHome merges remote packages and checks min_version before component schemas load, so the bump surfaces the right error instead.

CI green on stable, beta and dev.