Which of these mathematics education brands does NOT use the color palette described?

Educational product branding in mathematics uses color psychology to create recognition and appeal. Different companies leverage specific color schemes to establish their identity in the competitive educational tools market. This poll tests your knowledge of brand color associations in the mathematics education industry - can you spot which pairing doesn't match?

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Texas Instruments calculators - Black and red as primary colors
Khan Academy - Dark blue and teal in their mathematics section
Mathematica by Wolfram - Purple and orange as signature colors
Desmos graphing calculator - Red and white as primary brand colors