May haft save afew times if its a unselectible crew colour
TamperMonkey or another extension that allows you to use UserScript code on your browser is needed TamperMonkey extention link https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo
Original GTA Forum thread of bookmark/JavaScript https://gtaforums.com/topic/843211-crew-colour-editor
GreasyFork Installation Page https://greasyfork.org/en/scripts/439349-advanced-gta-v-crew-colour