This pattern matches the provided target items by breaking down the requirements for each type. It captures email addresses with or without subdomains, phone numbers with extensions or parentheses, various date formats including leap year, valid IPv4 and IPv6 addresses (with optional ports), hex color codes, RGB color definitions (including rgba with alpha), and specific nested brackets. It filters valid targets like '#123ABC' or '2001:db8::1', while avoiding invalid ones like fake colors and malformed IPs.