Bland

Mild; soft; gentle; smooth and soothing in manner; suave; as, a bland temper; bland persuasion; a bland sycophant.

Having soft and soothing qualities; not drastic or irritating; not stimulating; as, a bland oil; a bland diet.

smoothly agreeable and courteous with a degree of sophistication; "he was too politic to quarrel with so important a personage"; "the manager pacified the customer with a smooth apology for the error"