Published by the UN Environment Programme, these 2023 brand guidelines are designed to assist all partners involved in the International Day of Clean Air for blue skies, an occasion marked annually on 7 September to strengthen international cooperation in improving air quality and reducing air pollution.
In addition to logo use and colour palette, the guidelines cover a “halftone” graphic concept for imagery which can create a transition between different environments and is intended to show the change from problems to solutions. Use of the halftone effect seen in the primary logo or “Rasterisation” is the graphic approach for illustration and should follow a grid structure and comprise dots.
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