The default is that only metallic1 dragons use Change Shape. The Monster Manual spells out this ability specifically for metallic dragons.
(MM Page 103) Solitary Shapeshifters. At some point in their long lives, metallic dragons gain the magical ability to assume the forms of humanoids and beasts.
Note that when this ability arrives varies by dragon kind: Gold, Silver, and Bronze dragons can Change Shape as Ancient or Adult; Brass and Copper dragons only if Ancient.
No mention of this ability is made for chromatic dragons. By its absence, as compared to its explicit mention for metallic dragons, the conclusion is that this ability is limited to metallic dragons.
Potentially usable by chromatic dragons? Sure, why not, you're the DM.
You can certainly homebrew Change Shape as an ability for chromatic dragons: dragons are magical creatures.
Dragons are large reptilian creatures of ancient origin and tremendous
power. True dragons, including the good metallic dragons and the evil
chromatic dragons, are highly intelligent and have innate magic.
What you may need to decide is whether this ability is innate or learned. For example: gray hair is innate, not learned, among men as old as me; understanding how to see things from more points of view as I got older was learned.
If you want to reach back into game related lore that went beyond game rules, for a precedent, the Dragonlance lore includes the case of a green dragon (Cyan Bloodbane) using a shape changing ability to take on the form of an elf in order to spread evil in the elven homeland.
1This distinction goes back to the original forms of the game.