This is the Google+ colour palette, which contains 5 colours.

306-googleplus-redGoogle Plus Red
Hex: #d34836
RGB: 211, 72, 54
306-googleplus-dark-greyGoogle Plus Dark Grey
Hex: #2d2d2d
RGB: 45, 45, 45
306-googleplus-light-greyGoogle Plus Light Grey
Hex: #d2d2d2
RGB: 210, 210, 210
306-googleplus-lightest-greyGoogle Plus Lightest Grey
Hex: #f1f1f1
RGB: 241, 241, 241
WhiteWhite
Hex: #ffffff
RGB: 255, 255, 255

For more social media colours, see Social Media Colours – Hex and RGB Colours of the Web

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