[dev-overlay] fix: color contrast for terminal (#75736)
### Why?
The color contrast of the terminal violated the WCAG standard.
Example:
| Yellow | Blue |
|--------|--------|
|  |  |
### Before
#### Light
#### Dark
### After
#### Light
#### Dark
Closes https://linear.app/vercel/issue/NDX-657/fix-code-frame-color-contrast
