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The Sigma Technology logotype is a registered trademark. The Sigma Technology main logo is available in positive (black letters) and negative (white letters) versions. The colored version of the logo should be used as much as possible and is obligatory for web and digital usage. The positive version of the logo is used on light backgrounds, while the negative one is used on dark backgrounds. The outline logo is a complementary version of the main logo and is to be used as an alternative on scaled designs on solid background colors only. The positive version is to be used on solid light background colors only and the negative version on solid dark background colors.