Since ur baby is on EBF, no cause for worry. Their poo can present differently, just that when its green, it could signify that ur baby isnt getting enough hind milk which has more nutrients than d fore milk. Thats why mothers are advised to allow their baby empty one breast before putting him or her to d other breast.
My dear such happened to me same color bt worse Dan yours it will stop gradually since u are on e.b.f.there was the day I counted it was12 time's that day was even scared and took him to the hospital were I put to birth the doctor said there's no course of alarm now he poos like 3_4 time's dialy.
Registered Midwife