[{"name":"ABC","details":[{"color":"red","price":20000},{"color":"black","price":22000},{"color":"blue","price":21000}]},{"name":"XYZ","details":[{"color":"yellow","price":10000},{"color":"black","price":12000},{"color":"green","price":11000}]},{"name":"CBD","details":[{"color":"red","price":30000},{"color":"pink","price":32000},{"color":"blue","price":31000}]}]

db.collection.aggregate([{$match:{"details.color":{$in:["red","blue"]}}},{$set:{details:{$filter:{input:"$details",cond:{$in:["$$this.color",["red","blue"]]}}}}},{$unwind:"$details"},{$replaceWith:{$mergeObjects:[{name:"$name"},"$details"]}}])