Hi, it is working fine, great job.

One thing that I miss is to have the range defined so that we are restrict to 0.0 to 1.0 values. I think it is fine to use full floats as hard range, but for the soft range 0.0 to 1.0 makes more sense. (e.g., 0b38b8dafaa2).

The problem with that is that it makes more complicated to use the "Less Than" range. For instance, the Alpha is often 1.0. In this case for me to filter out any color I need to use "Less Than" 1.1. So maybe it is fine to leave the patch as it is.

If it's working well in Dalai's tests, the code looks good to me. I'd suggest changing the commit message and description a bit though, something like this:

Spreadsheet: Support operations for filtering colors

Support choosing an operation when filtering colors, like the other types.
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