Prang Colored Pencil Sets, 3.3 Mm, 2b (#1), Assorted Lead/barrel Colors, 50/pack : Wood Colored Pencils : Office Products
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How to Mix Different Shades of Blue Paint Colors - Trembeling Art
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Shades of Blue - A Color-Mixing Guide on How to Make Blue
Color Tone Terminology Handbook: Tint, Tone, Shade, and More
Colour Mixing: Eight Blues in Eight Limited Palettes - Jackson's Art Blog
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Ready-to-Use Tempera Paint - Prang