Add Icegray theme

[ghost]

Description

Added a new icegray theme.

Type of change

• Updated documentation (updated the readme, templates, or other repo files)

How Has This Been Tested?

• Tested locally with a valid username

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Screenshots

Without border:

With border:

[DenverCoder1]

Thanks for the contribution.

I'm thinking the contrast pretty low on this one making the text pretty difficult to read, maybe you could use darker colors for the text to make it more accessible?

This website can help check how accessible color combinations are https://webaim.org/resources/contrastchecker/?fcolor=C4C4C4&bcolor=FFFFFF

Also it seems the image you provided as a screenshot is different from how it currently appears on the site

[ghost]

Okay.
This is a screenshot from the demo site.
I'll fix it now.

[ghost]

I have updated the theme, documentation and PR.

[DenverCoder1]

Looks great! Thanks for the contribution 🎉