Founded in 1970, OBI GmbH & Co. Deutschland KG is the second largest DIY retailer in Europe, and the fourth largest in the world, behind The Home Depot, Lowe's and Kingfisher plc. It is headquartered in Wermelskirchen, Germany, and belongs to the Tengelmann Group.
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Chroma refers to the intensity of a color, how bright or dull it is. Scarlet and brick red are similar in value, but their intensity differs. Brick red is duller as it has a lower chroma than scarlet. Scarlet has a higher chroma so is more brilliant.