New colour box makes black and white hard to see in dark and light mode

[TomW1605]

Describe the bug
with the new colour box, setting the colour to black or white will make the box extreemly hard to see in dark and light mode respectivly

To Reproduce

1. add any spool with a full black or full white colour
2. go to the spool list

Expected behavior
some sort of boarder that makes it easier to see maybe

Screenshots

Spoolman Host (please complete the following information):

• Installation type: Standalone
• Installed version: Version 0.19.0 (c93ca5d)
• OS and Distro: Raspbian
• Database type: SQLite

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome

Additional context
Add any other context about the problem here.