Source: https://tfl.gov.uk/info-for/suppliers-and-contractors/design-standards
Bakerloo
Central
Circle
District
DLR
Hammersmith & City
Jubilee
Metropolitan
Northern
Overground
Piccadilly
Trams
Victoria
Waterloo & City
Elizabeth
TfL Blue
Source: web.mta.info/developers/resources/line_colors.htm
A,C,E Subways
B,D,F,M Subways
G Subway
J,Z Subways
L Subway
N,Q,R Subways
S Subway
1,2,3 Subways
4,5,6 Subways
7 Subway
Ginza Line
Marunouchi Line
Hibiya Line
Tozai Line
Chiyoda Line
Yurakucho Line
Fukutoshin Line
Hanzomon Line
Namboku Line
Source: web.mta.info/developers/resources/line_colors.htm
Babylon Branch
City Terminal Zone
Far Rockaway Branch
Hempstead Branch
Long Beach Branch
Montauk Branch
Oyster Bay Branch
Port Jefferson Branch
Port Washington Branch
Ronkonkoma Branch
West Hempstead Branch
Line 1
Line 2
Line 3
Line 3bis
Line 4
Line 5
Line 6
Line 7
Line 7bis
Line 8
Line 9
Line 10
Line 11
Line 12
Line 13
Line 14
Line 15
Line 16
Line 17
Line 18
1 - Sokolnicheskaya
2 - Zamoskvoretskaya
3 - Arbatsko-Pokrovskaya
4 - Filyovskaya
5 - Koltsevaya (Circle)
6 - Kaluzhsko-Rizhskaya
7 - Tagansko-Krasnopresnenskaya
8/8A - Kalininsko–Solntsevskaya line
9 - Serpukhovsko-Timiryazevskaya
10 - Lyublinsko-Dmitrovskaya
11A - Kakhovskaya
12 - Butovskaya
13 - Monorail
14 - Moscow Central Circle
U1
U2
U3
U4
U5
U55
U6
U7
U8
U9
Google Blue
Google Red
Google Yellow
Google Green
Microsoft Blue
Microsoft Red
Microsoft Yellow
Microsoft Green
Spotify Green
Discord Blue
Twitch Purple
Facebook Blue
Youtube Red
Reddit Orange
London Underground Lines
NYC Subway Lines
Tokyo Metro Lines
Long Island Rail Road Branches
Paris Métro Lines
Moscow Metro Lines
Berlin U-Bahn
Google Logo
Microsoft Logo
Miscellaneous Company Logo Colours