e_red_small.png https://github.com/exercism/exercism.io/blob/master/public/img/e_red_small.png Using the official exercism logo icon
logo.png https://github.com/exercism/exercism.io/blob/master/public/img/logo.png Using the official exercism logo
All the languages logos All images are downloaded from exercism.io refer to https://github.com/exercism/exercism.io/blob/master/ATTRIBUTION.md