Closest hex to #ff5555 is #f55

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#f55

ff5555

ff5555

contains f5

0f5 1f5 2f5 3f5 4f5 5f5 6f5 7f5 8f5 9f5 af5 bf5 cf5 df5 ef5 f50 f51 f52 f53 f54 f55 f56 f57 f58 f59 f5a f5b f5c f5d f5e f5f ff5

contains 55

055 155 255 355 455 550 551 552 553 554 555 556 557 558 559 55a 55b 55c 55d 55e 55f 655 755 855 955 a55 b55 c55 d55 e55 f55

contains f5

0f5 1f5 2f5 3f5 4f5 5f5 6f5 7f5 8f5 9f5 af5 bf5 cf5 df5 ef5 f50 f51 f52 f53 f54 f55 f56 f57 f58 f59 f5a f5b f5c f5d f5e f5f ff5