--- /dev/null
+#! /usr/bin/env python
+
+""" Convert values between RGB hex codes and xterm-256 color codes.
+
+Nice long listing of all 256 colors and their codes. Useful for
+developing console color themes, or even script output schemes.
+
+Resources:
+* http://en.wikipedia.org/wiki/8-bit_color
+* http://en.wikipedia.org/wiki/ANSI_escape_code
+* /usr/share/X11/rgb.txt
+
+I'm not sure where this script was inspired from. I think I must have
+written it from scratch, though it's been several years now.
+"""
+
+__author__ = 'Micah Elliott http://MicahElliott.com'
+__version__ = '0.1'
+__copyright__ = 'Copyright (C) 2011 Micah Elliott. All rights reserved.'
+__license__ = 'WTFPL http://sam.zoy.org/wtfpl/'
+
+#---------------------------------------------------------------------
+
+import sys, re
+
+CLUT = [ # color look-up table
+# 8-bit, RGB hex
+
+ # Primary 3-bit (8 colors). Unique representation!
+ ('00', '000000'),
+ ('01', '800000'),
+ ('02', '008000'),
+ ('03', '808000'),
+ ('04', '000080'),
+ ('05', '800080'),
+ ('06', '008080'),
+ ('07', 'c0c0c0'),
+
+ # Equivalent "bright" versions of original 8 colors.
+ ('08', '808080'),
+ ('09', 'ff0000'),
+ ('10', '00ff00'),
+ ('11', 'ffff00'),
+ ('12', '0000ff'),
+ ('13', 'ff00ff'),
+ ('14', '00ffff'),
+ ('15', 'ffffff'),
+
+ # Strictly ascending.
+ ('16', '000000'),
+ ('17', '00005f'),
+ ('18', '000087'),
+ ('19', '0000af'),
+ ('20', '0000d7'),
+ ('21', '0000ff'),
+ ('22', '005f00'),
+ ('23', '005f5f'),
+ ('24', '005f87'),
+ ('25', '005faf'),
+ ('26', '005fd7'),
+ ('27', '005fff'),
+ ('28', '008700'),
+ ('29', '00875f'),
+ ('30', '008787'),
+ ('31', '0087af'),
+ ('32', '0087d7'),
+ ('33', '0087ff'),
+ ('34', '00af00'),
+ ('35', '00af5f'),
+ ('36', '00af87'),
+ ('37', '00afaf'),
+ ('38', '00afd7'),
+ ('39', '00afff'),
+ ('40', '00d700'),
+ ('41', '00d75f'),
+ ('42', '00d787'),
+ ('43', '00d7af'),
+ ('44', '00d7d7'),
+ ('45', '00d7ff'),
+ ('46', '00ff00'),
+ ('47', '00ff5f'),
+ ('48', '00ff87'),
+ ('49', '00ffaf'),
+ ('50', '00ffd7'),
+ ('51', '00ffff'),
+ ('52', '5f0000'),
+ ('53', '5f005f'),
+ ('54', '5f0087'),
+ ('55', '5f00af'),
+ ('56', '5f00d7'),
+ ('57', '5f00ff'),
+ ('58', '5f5f00'),
+ ('59', '5f5f5f'),
+ ('60', '5f5f87'),
+ ('61', '5f5faf'),
+ ('62', '5f5fd7'),
+ ('63', '5f5fff'),
+ ('64', '5f8700'),
+ ('65', '5f875f'),
+ ('66', '5f8787'),
+ ('67', '5f87af'),
+ ('68', '5f87d7'),
+ ('69', '5f87ff'),
+ ('70', '5faf00'),
+ ('71', '5faf5f'),
+ ('72', '5faf87'),
+ ('73', '5fafaf'),
+ ('74', '5fafd7'),
+ ('75', '5fafff'),
+ ('76', '5fd700'),
+ ('77', '5fd75f'),
+ ('78', '5fd787'),
+ ('79', '5fd7af'),
+ ('80', '5fd7d7'),
+ ('81', '5fd7ff'),
+ ('82', '5fff00'),
+ ('83', '5fff5f'),
+ ('84', '5fff87'),
+ ('85', '5fffaf'),
+ ('86', '5fffd7'),
+ ('87', '5fffff'),
+ ('88', '870000'),
+ ('89', '87005f'),
+ ('90', '870087'),
+ ('91', '8700af'),
+ ('92', '8700d7'),
+ ('93', '8700ff'),
+ ('94', '875f00'),
+ ('95', '875f5f'),
+ ('96', '875f87'),
+ ('97', '875faf'),
+ ('98', '875fd7'),
+ ('99', '875fff'),
+ ('100', '878700'),
+ ('101', '87875f'),
+ ('102', '878787'),
+ ('103', '8787af'),
+ ('104', '8787d7'),
+ ('105', '8787ff'),
+ ('106', '87af00'),
+ ('107', '87af5f'),
+ ('108', '87af87'),
+ ('109', '87afaf'),
+ ('110', '87afd7'),
+ ('111', '87afff'),
+ ('112', '87d700'),
+ ('113', '87d75f'),
+ ('114', '87d787'),
+ ('115', '87d7af'),
+ ('116', '87d7d7'),
+ ('117', '87d7ff'),
+ ('118', '87ff00'),
+ ('119', '87ff5f'),
+ ('120', '87ff87'),
+ ('121', '87ffaf'),
+ ('122', '87ffd7'),
+ ('123', '87ffff'),
+ ('124', 'af0000'),
+ ('125', 'af005f'),
+ ('126', 'af0087'),
+ ('127', 'af00af'),
+ ('128', 'af00d7'),
+ ('129', 'af00ff'),
+ ('130', 'af5f00'),
+ ('131', 'af5f5f'),
+ ('132', 'af5f87'),
+ ('133', 'af5faf'),
+ ('134', 'af5fd7'),
+ ('135', 'af5fff'),
+ ('136', 'af8700'),
+ ('137', 'af875f'),
+ ('138', 'af8787'),
+ ('139', 'af87af'),
+ ('140', 'af87d7'),
+ ('141', 'af87ff'),
+ ('142', 'afaf00'),
+ ('143', 'afaf5f'),
+ ('144', 'afaf87'),
+ ('145', 'afafaf'),
+ ('146', 'afafd7'),
+ ('147', 'afafff'),
+ ('148', 'afd700'),
+ ('149', 'afd75f'),
+ ('150', 'afd787'),
+ ('151', 'afd7af'),
+ ('152', 'afd7d7'),
+ ('153', 'afd7ff'),
+ ('154', 'afff00'),
+ ('155', 'afff5f'),
+ ('156', 'afff87'),
+ ('157', 'afffaf'),
+ ('158', 'afffd7'),
+ ('159', 'afffff'),
+ ('160', 'd70000'),
+ ('161', 'd7005f'),
+ ('162', 'd70087'),
+ ('163', 'd700af'),
+ ('164', 'd700d7'),
+ ('165', 'd700ff'),
+ ('166', 'd75f00'),
+ ('167', 'd75f5f'),
+ ('168', 'd75f87'),
+ ('169', 'd75faf'),
+ ('170', 'd75fd7'),
+ ('171', 'd75fff'),
+ ('172', 'd78700'),
+ ('173', 'd7875f'),
+ ('174', 'd78787'),
+ ('175', 'd787af'),
+ ('176', 'd787d7'),
+ ('177', 'd787ff'),
+ ('178', 'd7af00'),
+ ('179', 'd7af5f'),
+ ('180', 'd7af87'),
+ ('181', 'd7afaf'),
+ ('182', 'd7afd7'),
+ ('183', 'd7afff'),
+ ('184', 'd7d700'),
+ ('185', 'd7d75f'),
+ ('186', 'd7d787'),
+ ('187', 'd7d7af'),
+ ('188', 'd7d7d7'),
+ ('189', 'd7d7ff'),
+ ('190', 'd7ff00'),
+ ('191', 'd7ff5f'),
+ ('192', 'd7ff87'),
+ ('193', 'd7ffaf'),
+ ('194', 'd7ffd7'),
+ ('195', 'd7ffff'),
+ ('196', 'ff0000'),
+ ('197', 'ff005f'),
+ ('198', 'ff0087'),
+ ('199', 'ff00af'),
+ ('200', 'ff00d7'),
+ ('201', 'ff00ff'),
+ ('202', 'ff5f00'),
+ ('203', 'ff5f5f'),
+ ('204', 'ff5f87'),
+ ('205', 'ff5faf'),
+ ('206', 'ff5fd7'),
+ ('207', 'ff5fff'),
+ ('208', 'ff8700'),
+ ('209', 'ff875f'),
+ ('210', 'ff8787'),
+ ('211', 'ff87af'),
+ ('212', 'ff87d7'),
+ ('213', 'ff87ff'),
+ ('214', 'ffaf00'),
+ ('215', 'ffaf5f'),
+ ('216', 'ffaf87'),
+ ('217', 'ffafaf'),
+ ('218', 'ffafd7'),
+ ('219', 'ffafff'),
+ ('220', 'ffd700'),
+ ('221', 'ffd75f'),
+ ('222', 'ffd787'),
+ ('223', 'ffd7af'),
+ ('224', 'ffd7d7'),
+ ('225', 'ffd7ff'),
+ ('226', 'ffff00'),
+ ('227', 'ffff5f'),
+ ('228', 'ffff87'),
+ ('229', 'ffffaf'),
+ ('230', 'ffffd7'),
+ ('231', 'ffffff'),
+
+ # Gray-scale range.
+ ('232', '080808'),
+ ('233', '121212'),
+ ('234', '1c1c1c'),
+ ('235', '262626'),
+ ('236', '303030'),
+ ('237', '3a3a3a'),
+ ('238', '444444'),
+ ('239', '4e4e4e'),
+ ('240', '585858'),
+ ('241', '626262'),
+ ('242', '6c6c6c'),
+ ('243', '767676'),
+ ('244', '808080'),
+ ('245', '8a8a8a'),
+ ('246', '949494'),
+ ('247', '9e9e9e'),
+ ('248', 'a8a8a8'),
+ ('249', 'b2b2b2'),
+ ('250', 'bcbcbc'),
+ ('251', 'c6c6c6'),
+ ('252', 'd0d0d0'),
+ ('253', 'dadada'),
+ ('254', 'e4e4e4'),
+ ('255', 'eeeeee'),
+]
+
+def _str2hex(hexstr):
+ return int(hexstr, 16)
+
+def _strip_hash(rgb):
+ # Strip leading `#` if exists.
+ if rgb.startswith('#'):
+ rgb = rgb.lstrip('#')
+ return rgb
+
+def _create_dicts():
+ short2rgb_dict = dict(CLUT)
+ rgb2short_dict = {}
+ for k, v in short2rgb_dict.items():
+ rgb2short_dict[v] = k
+ return rgb2short_dict, short2rgb_dict
+
+def short2rgb(short):
+ return SHORT2RGB_DICT[short]
+
+def print_all():
+ """ Print all 256 xterm color codes.
+ """
+ for short, rgb in CLUT:
+ sys.stdout.write('\033[48;5;%sm%s:%s' % (short, short, rgb))
+ sys.stdout.write("\033[0m ")
+ sys.stdout.write('\033[38;5;%sm%s:%s' % (short, short, rgb))
+ sys.stdout.write("\033[0m\n")
+ print "Printed all codes."
+ print "You can translate a hex or 0-255 code by providing an argument."
+
+def rgb2short(rgb):
+ """ Find the closest xterm-256 approximation to the given RGB value.
+ @param rgb: Hex code representing an RGB value, eg, 'abcdef'
+ @returns: String between 0 and 255, compatible with xterm.
+ >>> rgb2short('123456')
+ ('23', '005f5f')
+ >>> rgb2short('ffffff')
+ ('231', 'ffffff')
+ >>> rgb2short('0DADD6') # vimeo logo
+ ('38', '00afd7')
+ """
+ rgb = _strip_hash(rgb)
+ incs = (0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff)
+ # Break 6-char RGB code into 3 integer vals.
+ parts = [ int(h, 16) for h in re.split(r'(..)(..)(..)', rgb)[1:4] ]
+ res = []
+ for part in parts:
+ i = 0
+ while i < len(incs)-1:
+ s, b = incs[i], incs[i+1] # smaller, bigger
+ if s <= part <= b:
+ s1 = abs(s - part)
+ b1 = abs(b - part)
+ if s1 < b1: closest = s
+ else: closest = b
+ res.append(closest)
+ break
+ i += 1
+ #print '***', res
+ res = ''.join([ ('%02.x' % i) for i in res ])
+ equiv = RGB2SHORT_DICT[ res ]
+ #print '***', res, equiv
+ return equiv, res
+
+RGB2SHORT_DICT, SHORT2RGB_DICT = _create_dicts()
+
+#---------------------------------------------------------------------
+
+if __name__ == '__main__':
+ import doctest
+ doctest.testmod()
+ if len(sys.argv) == 1:
+ print_all()
+ raise SystemExit
+ arg = sys.argv[1]
+ if len(arg) < 4 and int(arg) < 256:
+ rgb = short2rgb(arg)
+ sys.stdout.write('xterm color \033[38;5;%sm%s\033[0m -> RGB exact \033[38;5;%sm%s\033[0m' % (arg, arg, arg, rgb))
+ sys.stdout.write("\033[0m\n")
+ else:
+ short, rgb = rgb2short(arg)
+ sys.stdout.write('RGB %s -> xterm color approx \033[38;5;%sm%s (%s)' % (arg, short, short, rgb))
+ sys.stdout.write("\033[0m\n")
\ No newline at end of file
projects / rainbowstream.git / commitdiff
