Arrange FLORA and the color sensor in your third hand tool as shown, facing opposite each other but still with 3v, SCL, SDA, and GND pads aligned.
Solder four short wires to FLORA and clip off any excess.
Trim two diagonal pins from a tactile switch, and then poke the remaining two legs through D10 and GND on FLORA.
Solder in place.
Now that your color sensor is attached, you can test it out by hooking up your NeoPixels and running the sample code included with the color sensor library, the Chameleon Scarf code, or the code included later in this guide.