# Tailwind CSS v4.0.7 — Release & Upgrade Intelligence
- **Product:** Tailwind CSS (https://tailwindcss.com)
- **Version:** v4.0.7
- **Released:** Feb 18, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/tailwind/updates/v4.0.7/

## Executive Summary (TL;DR)
Tailwind CSS v4.0.7. Source highlight: Export `tailwindcss/lib/util/flattenColorPalette.js` for backward compatibility (#16411)

## Bug Fixes
- Export `tailwindcss/lib/util/flattenColorPalette.js` for backward compatibility (#16411)
- Fix sorting of numeric utility suggestions when they have different magnitudes (#16414)
- Show suggestions for fractions in IntelliSense (#16353)
- Don’t replace `_` in suggested theme keys (#16433)
- Ensure `--default-outline-width` can be used to change the `outline-width` value of the `outline` utility (#16469)
- Ensure drop shadow utilities don't inherit unexpectedly (#16471)

## Upgrade Command
```bash
npm install --save-exact tailwindcss@4.0.7
```