Colorful clouds!
© Brian Gird
The colorful clouds are part of something called a "circumhorizontal arc," and we are getting into the time of year when we can see these at our latitude.

The colors are caused by sunlight passing through ice crystals that look like a hexagonal plate. The crystal refracts the sunlight, like a prism, and separates the light into colors that we can see (ROYGBIV). The ice crystals need to be horizontally oriented to allow the sunlight to enter the side of the crystal, get refracted inside the plate, then exit the bottom of the crystal.
Colorful clouds in MA
© WCVB 5
The reason we can now see these circumhorizontal arcs is because the sun has to be higher than 58 degrees above the horizon. You may find such arcs usually during the midday hours.

The halo actually extends 360 degrees around the sky, however, it is only visible when the refracted light is reflected off of clouds.