Add support for Tailwind token with opacity modifier syntax color

[serkodev]

Clear and concise description of the problem

Tailwind CSS variables color:
https://tailwindcss.com/docs/customizing-colors#using-css-variables

source:
https://github.com/tailwindlabs/tailwindcss/blob/759a8c2061fbb9aabd0ec9c5f534652e7a2c9717/src/util/pluginUtils.js#L107-L115

Suggested solution

Replace color <alpha-value> with 1

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that requests the same feature to avoid creating a duplicate.