abstract initial letter bt or tb logo in black, red, and green color in white background

font brand text logo line diagram advertising label presentation signage circle document banner number cartoon sign poster abstract initial letter black red green color isolated white background straight linked bold gradient fire colors technology font symbol template shape label art sign typography identity corporate branding unusual logo bt logotype icon abstract vector business design concept alphabet line black creative color graphic red internet web letter modern management company media market service application capital brand corporation initial bold professional type simple consulting