chore: simplify colors

[daibhin]

Problem

Simplify colors

Changes

Removed unnecessary derived colors

Does this work well for both Cloud and self-hosted?

Yes

How did you test this code?

Seeing snapshot changes

[github-actions[bot]]

Size Change: +9 B (0%)

Total Size: 1.07 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.07 MB	+9 B (0%)

_{compressed-size-action}

[posthog-bot]

📸 UI snapshots have been updated

62 snapshot changes in total. 0 added, 62 modified, 0 deleted:

• chromium: 0 added, 62 modified, 0 deleted (diff for shard 1, diff for shard 2)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[robbie-c]

No snapshots changed = approved