Get empty userpic color by Telegram ID as an official client

tg_color_picker.v

// https://github.com/telegramdesktop/tdesktop/blob/2ef8136308e31e07988ee4654b73ae2a5ab495dc/Telegram/SourceFiles/ui/empty_userpic.cpp#L257
// https://github.com/telegramdesktop/tdesktop/blob/dev/Telegram/SourceFiles/ui/chat/chat_style.cpp#L1033

struct Color {
    red u8
    green u8
    blue u8
}

fn (c Color) str() string {
	return '#${c.red.hex()}${c.green.hex()}${c.blue.hex()}'.to_upper()
}

fn pick_color(id u64) Color {
	
	colors := {
		// historyPeer1UserpicBg — ff845e
		// red
		0: Color {
			red: 255
			green: 132
			blue: 94
		}
		// historyPeer2UserpicBg — 9ad164
		// green
		1: Color {
			red: 154
			green: 209
			blue: 100
		}
		// historyPeer3UserpicBg — e5ca77 (unused)
		// yellow (unused)
		2: Color {
			red: 229
			green: 202
			blue: 119
		}
		// historyPeer4UserpicBg — 5caffa
		// blue
		3: Color {
			red: 92
			green: 175
			blue: 250
		}
		// historyPeer5UserpicBg — b694f9
		// purple
		4: Color {
			red: 182
			green: 148
			blue: 249
		}
		// historyPeer6UserpicBg — ff8aac
		// pink
		5: Color {
			red: 255
			green: 138
			blue: 172
		}
		// historyPeer7UserpicBg — 5bcbe3
		// sea
		6: Color {
			red: 91
			green: 203
			blue: 227
		}
		// historyPeer8UserpicBg — febb5b
		// orange
		7: Color {
			red: 254
			green: 187
			blue: 91
		}
	}
	
	color_order := [0 7 4 1 6 3 5]

	return colors[color_order[id % 7]]
}

fn main() {
	println(pick_color().str())
}