Module: LetterAvatar::Colors

Defined in:
lib/letter_avatar/colors.rb

Constant Summary collapse

PALETTES = 
[:google, :iwanthue, :custom]
GOOGLE_COLORS = 
[
  [226, 95, 81], # A
  [242, 96, 145], # B
  [187, 101, 202], # C
  [149, 114, 207], # D
  [120, 132, 205], # E
  [91, 149, 249], # F
  [72, 194, 249], # G
  [69, 208, 226], # H
  [72, 182, 172], # I
  [82, 188, 137], # J
  [155, 206, 95], # K
  [212, 227, 74], # L
  [254, 218, 16], # M
  [247, 192, 0], # N
  [255, 168, 0], # O
  [255, 138, 96], # P
  [194, 194, 194], # Q
  [143, 164, 175], # R
  [162, 136, 126], # S
  [163, 163, 163], # T
  [175, 181, 226], # U
  [179, 155, 221], # V
  [194, 194, 194], # W
  [124, 222, 235], # X
  [188, 170, 164], # Y
  [173, 214, 125] # Z
].freeze
IWANTHUE_COLORS = 
[
  [198, 125, 40],
  [61, 155, 243],
  [74, 243, 75],
  [238, 89, 166],
  [52, 240, 224],
  [177, 156, 155],
  [240, 120, 145],
  [111, 154, 78],
  [237, 179, 245],
  [237, 101, 95],
  [89, 239, 155],
  [43, 254, 70],
  [163, 212, 245],
  [65, 152, 142],
  [165, 135, 246],
  [181, 166, 38],
  [187, 229, 206],
  [77, 164, 25],
  [179, 246, 101],
  [234, 93, 37],
  [225, 155, 115],
  [142, 140, 188],
  [223, 120, 140],
  [249, 174, 27],
  [244, 117, 225],
  [137, 141, 102],
  [75, 191, 146],
  [188, 239, 142],
  [164, 199, 145],
  [173, 120, 149],
  [59, 195, 89],
  [222, 198, 220],
  [68, 145, 187],
  [236, 204, 179],
  [159, 195, 72],
  [188, 121, 189],
  [166, 160, 85],
  [181, 233, 37],
  [236, 177, 85],
  [121, 147, 160],
  [234, 218, 110],
  [241, 157, 191],
  [62, 200, 234],
  [133, 243, 34],
  [88, 149, 110],
  [59, 228, 248],
  [183, 119, 118],
  [251, 195, 45],
  [113, 196, 122],
  [197, 115, 70],
  [80, 175, 187],
  [103, 231, 238],
  [240, 72, 133],
  [228, 149, 241],
  [180, 188, 159],
  [172, 132, 85],
  [180, 135, 251],
  [236, 194, 58],
  [217, 176, 109],
  [88, 244, 199],
  [186, 157, 239],
  [113, 230, 96],
  [206, 115, 165],
  [244, 178, 163],
  [230, 139, 26],
  [241, 125, 89],
  [83, 160, 66],
  [107, 190, 166],
  [197, 161, 210],
  [198, 203, 245],
  [238, 117, 19],
  [228, 119, 116],
  [131, 156, 41],
  [145, 178, 168],
  [139, 170, 220],
  [233, 95, 125],
  [87, 178, 230],
  [157, 200, 119],
  [237, 140, 76],
  [229, 185, 186],
  [144, 206, 212],
  [236, 209, 158],
  [185, 189, 79],
  [34, 208, 66],
  [84, 238, 129],
  [133, 140, 134],
  [67, 157, 94],
  [168, 179, 25],
  [140, 145, 240],
  [151, 241, 125],
  [67, 162, 107],
  [200, 156, 21],
  [169, 173, 189],
  [226, 116, 189],
  [133, 231, 191],
  [194, 161, 63],
  [241, 77, 99],
  [241, 217, 53],
  [123, 204, 105],
  [210, 201, 119],
  [229, 108, 155],
  [240, 91, 72],
  [187, 115, 210],
  [240, 163, 100],
  [178, 217, 57],
  [179, 135, 116],
  [204, 211, 24],
  [186, 135, 57],
  [223, 176, 135],
  [204, 148, 151],
  [116, 223, 50],
  [95, 195, 46],
  [123, 160, 236],
  [181, 172, 131],
  [142, 220, 202],
  [240, 140, 112],
  [172, 145, 164],
  [228, 124, 45],
  [135, 151, 243],
  [42, 205, 125],
  [192, 233, 116],
  [119, 170, 114],
  [158, 138, 26],
  [73, 190, 183],
  [185, 229, 243],
  [227, 107, 55],
  [196, 205, 202],
  [132, 143, 60],
  [233, 192, 237],
  [62, 150, 220],
  [205, 201, 141],
  [106, 140, 190],
  [161, 131, 205],
  [135, 134, 158],
  [198, 139, 81],
  [115, 171, 32],
  [101, 181, 67],
  [149, 137, 119],
  [37, 142, 183],
  [183, 130, 175],
  [168, 125, 133],
  [124, 142, 87],
  [236, 156, 171],
  [232, 194, 91],
  [219, 200, 69],
  [144, 219, 34],
  [219, 95, 187],
  [145, 154, 217],
  [165, 185, 100],
  [127, 238, 163],
  [224, 178, 198],
  [119, 153, 120],
  [124, 212, 92],
  [172, 161, 105],
  [231, 155, 135],
  [157, 132, 101],
  [122, 185, 146],
  [53, 166, 51],
  [70, 163, 90],
  [150, 190, 213],
  [210, 107, 60],
  [166, 152, 185],
  [159, 194, 159],
  [39, 141, 222],
  [202, 176, 161],
  [95, 140, 229],
  [168, 142, 87],
  [93, 170, 203],
  [159, 142, 54],
  [14, 168, 39],
  [94, 150, 149],
  [187, 206, 136],
  [157, 224, 166],
  [235, 158, 208],
  [109, 232, 216],
  [141, 201, 87],
  [208, 124, 118],
  [142, 125, 214],
  [19, 237, 174],
  [72, 219, 41],
  [234, 102, 111],
  [168, 142, 79],
  [188, 135, 35],
  [95, 155, 143],
  [148, 173, 116],
  [223, 112, 95],
  [228, 128, 236],
  [206, 114, 54],
  [195, 119, 88],
  [235, 140, 94],
  [235, 202, 125],
  [233, 155, 153],
  [214, 214, 238],
  [246, 200, 35],
  [151, 125, 171],
  [132, 145, 172],
  [131, 142, 118],
  [199, 126, 150],
  [61, 162, 123],
  [58, 176, 151],
  [215, 141, 69],
  [225, 154, 220],
  [220, 77, 167],
  [233, 161, 64],
  [130, 221, 137],
  [81, 191, 129],
  [169, 162, 140],
  [174, 177, 222],
  [236, 174, 47],
  [233, 188, 180],
  [69, 222, 172],
  [71, 232, 93],
  [118, 211, 238],
  [157, 224, 83],
  [218, 105, 73],
  [126, 169, 36]
].freeze

Class Method Summary collapse

Class Method Details

.for(username) ⇒ Object 



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# File 'lib/letter_avatar/colors.rb', line 253

def self.for(username)
  public_send("with_#{LetterAvatar.colors_palette}", username)
end

.google ⇒ Object

Colors form Google Inbox inbox.google.com



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# File 'lib/letter_avatar/colors.rb', line 292

def self.google
  GOOGLE_COLORS
end

.iwanthue ⇒ Object

palette of optimally disctinct colors cf. tools.medialab.sciences-po.fr/iwanthue/index.php parameters used:

- H: 0 - 360
- C: 0 - 2
- L: 0.75 - 1.5



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# File 'lib/letter_avatar/colors.rb', line 302

def self.iwanthue
  IWANTHUE_COLORS
end

.valid_custom_palette?(palette) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/letter_avatar/colors.rb', line 282

def self.valid_custom_palette?(palette)
	return false unless palette.is_a?(Array)
	return palette.all? do |color| 
		false unless color.is_a?(Array)
		color.all? { |i| i.is_a?(Integer) }
	end
end

.with_custom(username) ⇒ Object 



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# File 'lib/letter_avatar/colors.rb', line 277

def self.with_custom(username)
	custom_palette = LetterAvatar.custom_palette
	custom_palette[Digest::MD5.hexdigest(username)[0...15].to_i(16) % custom_palette.length]
end

.with_google(username) ⇒ Object 



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# File 'lib/letter_avatar/colors.rb', line 263

def self.with_google(username)
  char = username[0].upcase

  if /[A-Z]/ =~ char
    # 65 is 'A' ord
    idx = char.ord - 65
    google[idx]
  elsif /[\d]/ =~ char
    google[char.to_i]
  else
    google[Digest::MD5.hexdigest(username)[0...15].to_i(16) % google.length]
  end
end

.with_iwanthue(username) ⇒ Object 



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# File 'lib/letter_avatar/colors.rb', line 257

def self.with_iwanthue(username)
  iwanthue[
    Digest::MD5.hexdigest(username)[0...15].to_i(16) % iwanthue.length
  ]
end