def find_among_term_colors(term, color_model)
      rgb = @value.map { |byte| nearest_term_256(byte) }
      term = PryTheme::RGB::TABLE.index(rgb)
      approximate(term, color_model)
    end
def find_among_term_colors(term, color_model)
      rgb = @value.map { |byte| nearest_term_256(byte) }
      term = PryTheme::RGB::TABLE.index(rgb)
      approximate(term, color_model)
    end
Finds an approximated +term+ colour among the colour numbers within the
 given +color_model+.

 @param [Integer] term a colour to be approximated
 @param [Integer] color_model possible values {#to_term}
 @return [Integer] approximated number, which fits in range of color_model