RGB colour block should not allow input values which are out of bounds

[Caffetaria]

Describe the bug

• The RGB colour block should not allow input values which are less than 0 or greater than 255.

To Reproduce Steps to reproduce the behavior:

1. Create a NEPO program
2. Use the RGB colour block
3. Enter a value which is either less than 0 or greater than 255

Expected behavior

• Values which are out of range should not be accepted and should be highlighted in red while entering.

Screenshots

Expected behaviour(already carried out when you try to enter alphabets)

Device information

• Type : Desktop
• OS: MacOS
• Browser: Chrome