Dynamic Range Names

Looking to create three dynamic ranges that move based on field 1 of the attached spreadsheet sample.

The first range would be named "Blue", the second "Red" and the third "Green". Each day, new data will populate this same sheet (in the same format), only there will be a different number of rows for each color (sometimes less, sometimes more). What is the formula to create these dynamic ranges? If you can tell me how to do one of them, I can likely figure out the other two.

Thanks greatly, in advanced. This will really help me.

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