Information about the Chromatic Orb spell in Dungeons and Dragons 5th Edition is not freely available. It can be found on page 221 of the Player's Handbook.
Chromatic Orb Edit
Casting Time: 1 action
Range: 90 feet
Components: V, S, M (a diamond worth at least 50 gp)
You hurl a 4-inch-diameter sphere of energy at a creature that you can see within range. You choose acid, cold, fire, lightning, poison, or thunder for the type of orb you create, and then make a ranged spell attack against the target. If the attack hits, the creature takes 3d8 damage o f the type you chose.
At Higher Levels: When you cast this spell using a spell slot o f 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.