Here is a set of PC fans that you can use to build a more colorful rig. The Thermaltake Pure Plus RGB TT Radiator Fan works with Amazon Alexa. Its companion app lets you monitor performance, adjust fan speeds, and customize lighting effects.
You get 10 light modes to choose from. 9 addressable LEDs are available on each fan. These 120mm 9-blade fans are available for $70 (3 pack).