/summon sheep ~ ~ ~ {Color:true,NoAI:1} works (orange sheep). It probably shouldn't.

Where it shouldn’t work:

• sheep/shulker Color
• wolf CollarColor
• item Count
• item Slot
• potion data Amplifier
• potion data Id
• creeper ExplosionRadius
• zombie villager/zombie/husk/drowned DrownedConversionTime
• shulker Peek
• shulker AttachFace
• arrow/spectral arrow/trident shake
• arrow/spectral arrow/trident pickup
• xp orb Health
• firework Type
• firework Flight
• item frame/painting Facing
• item frame ItemRotation
• brewing stand Fuel
• map Decorations.type

Where it should work:

• entity OnGround
• mob NoAI
• entity NoGravity
• entity Invulnerable
• entity CustomNameVisible
• entity Silent
• entity Glowing
• mob/armor stand FallFlying
• potion data Ambient
• potion data ShowParticles
• mob CanPickUpLoot
• mob PersistenceRequired
• mob LeftHanded
• mob Leashed
• bat BatFlags
• chicken IsChickenJockey
• creeper powered
• creeper ignited
• donkey/horse/mule/llama/zombie horse/skeleton horse Bred
• donkey/horse/mule/llama/zombie horse/skeleton horse EatingHayStack
• donkey/horse/mule/llama/zombie horse/skeleton horse Tame
• donkey/mule/llama ChestedHorse
• zombie villager/zombie/husk/drowned IsBaby
• zombie villager/zombie/husk/drowned CanBreakDoors
• endermite PlayerSpawned
• slime/magma cube wasOnGround
• pig Saddle
• sheep Sheared
• skeleton horse SkeletonTrap
• snow golem Pumpkin
• villager Willing
• villager trade rewardExp
• iron golem PlayerCreated
• vindicator Johnny
• wolf Angry
• arrow/spectral arrow/trident player
• arrow/spectral arrow/trident inGround
• arrow/spectral arrow/trident crit
• minecarts CustomDisplayTile
• command block (minecart) TrackOutput
• hopper minecart Enabled
• falling block DropItem
• falling block HurtEntities
• armor stand Marker
• armor stand Invisible
• armor stand NoBasePlate
• armor stand ShowArms
• armor stand Small
• ender crystal ShowBottom
• firework Flicker
• firework Trail
• command block/structure block powered
• command block conditionMet
• command block auto
• command block UpdateLastExecution
• end gateway ExactTeleport
• moving piston extending
• moving piston source
• structure block ignoreEntities
• player SpawnForced
• player Sleeping
• player abilities.mayfly
• player abilities.invulnerable
• player abilities.flying
• player abilities.mayBuild
• player abilities.instabuild
• player seenCredits
• recipe book isFilteringCraftable
• recipe book isGuiOpen
• tool/armor Unbreakable
• written book resolved
• map map_tracking_position