chore(coreTheme + platformTheme): updating and adding color tokens

[LinKCoding]

Overview

Updates + Additions to the core theme red swatches:

• Updates red-0 to red-300 and red-100 to red-400
• Adds a new red-100 and red-900
• Uses the new red-100 and red-900 for background-error

Updates the Platform Theme to:

• change the background-primary light mode color from beige to blue-0
• update editor-comment — light: navy-300 => navy-500 (#686C7B), dark: gray-600 => white-500 (#84868D)
• update editor-key — light: teal-500's HEX value from 027E97 to 006D82
• update editor-ui-indent-active — light: navy-900 => navy-300 (#BCBDC4), dark: gray:900 => white-300 (#3B3D49)
• update editor-ui-indent-inactive — light: navy-600 => navy-400 (#8E919D), dark: gray:800 => white-400 (#5F616B)
• add editor-ui-line-number-active — light: navy-700 (#31374C), dark: white-700 (#CECFD2)
• rename and update editor-ui-line-number to editor-ui-line-number-inactive — light: navy-300 => navy-500 (#686C7B), dark: gray:600 => white-500 (#84868D)

PR Checklist

• Related to designs: https://www.figma.com/design/ReGfRNillGABAj5SlITalN/%F0%9F%93%90-Gamut?node-id=99138-70473&m=dev
• Related to JIRA ticket: GM-1153
• I have run this code to verify it works
• This PR includes unit tests for the code change
• This PR includes testing instructions tests for the code change
• The alpha package of this PR is passing end-to-end tests in all relevant Codecademy repositories

Testing Instructions

You can see the approved PRs:

1. Red swatches: chore(coreTheme): update and add red color tokens #3113
2. Yellow/Green swatches: chore(color tokens): added yellow-900, green-900 and used it for background-warning and background-success #3114
3. PlatformTheme related: chore(platformTheme): update color tokens #3115
4. Check over the new hex colors in the platform theme page
   ...
5. Finish and do a celebratory dance

PR Links and Envs

Repository	PR Link
Monolith	Monolith PR
Mono	Mono PR

[nx-cloud]

View your CI Pipeline Execution ↗ for commit e42a8bc

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☁️ Nx Cloud last updated this comment at 2025-07-17 18:00:30 UTC

[dreamwasp]

🌈

[aresnik11]

LGTM! Just one suggestion

[codecademydev]

📬Published Alpha Packages:

@codecademy/gamut@66.0.1-alpha.e42a8b.0
@codecademy/gamut-icons@9.46.2-alpha.e42a8b.0
@codecademy/gamut-illustrations@0.54.6-alpha.e42a8b.0
@codecademy/gamut-kit@0.6.523-alpha.e42a8b.0
@codecademy/gamut-patterns@0.10.12-alpha.e42a8b.0
@codecademy/gamut-styles@17.6.5-alpha.e42a8b.0
@codecademy/gamut-tests@5.2.11-alpha.e42a8b.0
@codecademy/styleguide@77.0.3-alpha.e42a8b.0

[codecademydev]

🚀 Styleguide deploy preview ready!

https://68793a549dc6ff8a8b859d3e--gamut-preview.netlify.app

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