The '+' icon is difficult to identify due to its color matching the folder icons

[ScenarioKG]

Describe the Bug The '+' icon blends with the folder color, making it difficult to identify.

Steps to Reproduce

1. Open the app with the default color scheme.
2. Locate the '+' icon.

Expected Behavior The '+' icon should have a distinct color that contrasts with the folder icons for better visibility.

Screenshots

Smartphone (please complete the following information):

• Device: Google Pixel 5
• OS: Android 14
• Rooted: No
• Version: 3.10

[EmmanuelMess]

Adding accessibility as some users might have a more difficult time with the contrast issue.