How to have a color-specified scatter plot in excel?

First, create a scatter plot on just one of the attributes (A, for example).

Then, copy the X and Y data (not the labels) for the next attribute, select the chart object, then use Home>Paste>Paste Special from the ribbon to paste the copied data as a new series.

Be sure to select the chart before using Paste Special.

Repeat this process until you have a chart with as many series as attributes. Then edit the series name to whatever you choose.

Apart Paste Special, we could also use Select Date Source.

Go to Insert > Choose one Scatter Graphic in Charts group, then we will get a blank chart.

Right click this blank chart > Select Date Source > click Add > Enter the Series Name, such as Label A, select the data range for X values and Y values.

Do the same step but select different date ranges for other Label B and Label C.