vscode: color adjustments

[rpradosilva]

What would you like to be added:

To improve the colors contrast

Additional context

I tested the extension files: markdown, html, css, json, js and njk.

Why is this needed

In the files: HTML, CSS and markdown - Change strings/text to low opacity.

JS:

• The variable names and parameters did not receive colors, they are the same colors as the strings (white).
• The colors for the methods receive a low opacity color, they need more contrast.
• The strings are green with high contrast, but need low contrast.

Theme color: Aura Dark Plus
i love and i'm already using this theme!

[rpradosilva]

My suggestion: