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phthalo blue is a nice happy colour. Bright crystalline blue. Typically used to make water or the sky.
Now we're gonna add some phthalo blue to make some nice water...
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by SiloueOfUlrin November 10, 2019
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A shade of blue similar to sapphire. It is NOT a drug reference.
Bob Ross: Let's use a little bit of Phthalo Blue to give this happy little cloud some textures
Me: Oh please do.
by Stevy204 May 08, 2019
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