Condtional formattingf after certain cells

[rayted]

Hi guys

here is a sheet I am working with:

https://docs.google.com/spreadsheets...it?usp=sharing

I would like for a conditional formatting rule to highlight a cell in red if A8 onwards has no text (a score, after the colon ':') is this possible? I want the cell to be red

thank you!

[Special-K]

Select the range to highlight, e.g. A8:A1000

Conditional Formatting
New Rule
Use a formula to determine...

=right(A8,len(A8)-find(":",A8))=""

Format as red