Problem 60951. Extra colors

Context
In the RGB color system used by Matlab, the color is a 1 x 3 / row vector [R G B] with each value/component R, G, B in the range 0 <= component <= 1. Each color defined is associated to its name and a one letter abridged version of it. For instance [1 0 0] matches with 'red' and 'r' . [0 1 1] matches with 'cyan' and 'c' and is a balanced mix of one component of green [0 1 0] with one component of blue [0 0 1]. Refer to the LineSpec field in the documentation of plot function for further information and the list of registered colors.
Your mission (should you choose to accept it ;-)
Provide the corresponding code (output vector) to one of these three new / given colors (input full string or abridged) :
  • 'violet' / 'v' is is an additive mix of one component of red with two components of blue;
  • 'purple' / 'p' is a balanced additive mix of one component of magenta with one component of black;
  • 'gray' / 'a' is a balanced additive mix of one component of white with one component of black.
Your algorithm must be case insensitive.
Forbidden functions
  • regexp
  • str2num
  • assignin
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Solve

Solution Stats

50.0% Correct | 50.0% Incorrect
Last Solution submitted on Jul 24, 2025

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bit code colors rgb string vector

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