Module:Hockey team color

This module is currently only used by

{{NHL team color}}

Usage

• {{#invoke:Hockey team color|color}} in any variation of the color templates.

• {{#invoke:Hockey team color|function_name}} As a general rule for how the module functions.

Updating team colors

See Module:Hockey team color/data.

Test table

Team	1	2	3	4	5	Contrast
						1/2	4/3
Anaheim Ducks						21	1.03
Arizona Coyotes					X	8.83	16.45
Boston Bruins				X	X	21
Buffalo Sabres					X	14.94	1.24
Calgary Flames					X	4.65	12.68
Carolina Hurricanes					X	6.34	6.18
Chicago Blackhawks				X	X	4.65
Colorado Avalanche						10.06	2.77
Columbus Blue Jackets					X	16.05	2.61
Dallas Stars					X	6.22	8.84
Detroit Red Wings					X	4.65	4.65
Edmonton Oilers				X	X	10.52
Florida Panthers					X	5.88	6.02
Los Angeles Kings				X	X	21
Minnesota Wild						5.99	5.18
Montreal Canadiens				X	X	5.99
Nashville Predators				X	X	1.73
New Jersey Devils				X	X	4.65
New York Islanders				X	X	7.84
New York Rangers				X	X	6.66
Ottawa Senators					X	4.65	8.83
Philadelphia Flyers				X	X	2.74
Pittsburgh Penguins				X	X	21
San Jose Sharks					X	5.19	8.85
St. Louis Blues					X	7.82	7.84
Tampa Bay Lightning				X	X	10.72
Toronto Maple Leafs					X	11.47	11.47
Vancouver Canucks				X	X	10.55
Vegas Golden Knights					X	10.8	4.62
Washington Capitals				X	X	4.65
Winnipeg Jets						16.54	2.95
Free agent			X	X	X	15.31
Retired			X	X	X	15.31

The numeric columns are the calculated contrast ratio for the first/second and the fourth/third colors. Anything lower than 3 is very poor contrast and should be changed in the data module. For more information, see Template:Color contrast ratio.

---

--
-- This module implements (or will be implemented)
-- {{NHL color}}
--
local p = {}

local data_module = "Module:Hockey team color/data"

local function stripwhitespace(text)
	return text:match("^%s*(.-)%s*$")
end

local function get_colors(team, unknown)
	team = stripwhitespace(team or '')
	unknown = unknown or {"DCDCDC", "FFFFFF", "000000", "000000"}
	
	local use_default = {
		[""] = 1,
		["retired"] = 1,
		["free agent"] = 1,
	}

	local colors = nil
	
	if ( team and use_default[team:lower()] ) then
		colors = {"DCDCDC", "FFFFFF", "DCDCDC", "000000"}
	else
		local all_colors = mw.loadData(data_module)
		colors = all_colors[team]
		if ( colors and type(colors) == 'string' ) then
			colors = all_colors[colors]
		end
	end

	return colors or unknown
end

local function team_color(team, num)
	local colors = get_colors(team, nil)

	num = tonumber(num:match('[1-4]') or '0')
	if ( num ) then
		return colors[num]
	else
		return ''
	end
end

function p.color(frame)
	local args = (frame.args[1] ~= nil) and frame.args or frame:getParent().args
	return team_color(args[1] or '', args[2] or '')
end

return p

This module "Hockey team color" is from Wikipedia if otherwise notified