Convert iterm colors to hex

convert.rb

#!/usr/bin/env ruby

require 'json'

filename = 'iterm_colors.json'

mappings = [
  "black",
  "red",
  "green",
  "yellow",
  "blue",
  "magenta",
  "cyan",
  "white",
]

json = JSON.parse(File.read(filename))

def to_hex(val_double)
  val_in_hex = (val_double * 255).round.to_s(16).rjust(2, '0').upcase
  val_in_hex
end

def get_val(json_key)
  json_key.match(/\d+/)[0].to_i rescue nil
end

sorted_keys = json.keys.sort_by { |it| get_val(it) || -1 }

sorted_keys.each do |key|
  val = json[key]
  r = to_hex(val["Red Component"])
  g = to_hex(val["Green Component"])
  b = to_hex(val["Blue Component"])
  rgb = "#{r}#{g}#{b}"
  if ansi_val = get_val(key)
    is_bright = ansi_val >= mappings.length
    ansi_val = ansi_val % mappings.length
    key = "#{is_bright ? 'Bright' : 'Regular'} #{mappings[ansi_val]}"
  end
  puts "[#{key}]: ##{rgb}"
end