２進数－１０進数対応表
２進数－１０進数対応表
２進数－１０進数 対応表
２進数－１０進数 対応表
２進数－１０進数 対応表とは、ＲＧＢ各色を６段階の組み合わせで表現できる２１６色（6x6x6=216）。 「Webセーフカラー」という名前が規格として規定されているわけではないらしいが、一定の認知度はあると思われる。 ちなみに機種依存が少ないとされているが、逆に言えば細かい色の指定ができないので、結果的に機種依存しにくいとも言える。
２進数－１０進数 対応表
２進数－１０進数 対応表を作成しました。| ２進数 | １６進数 | １０進数 | ||||
|---|---|---|---|---|---|---|
| 符号なし | ２の補数 | １の補数 | 絶対表現 | 8 ビット エクセス127 | ||
| 00000000 | 00 | 0 | ← | ← | ← | -127 |
| 00000001 | 01 | 1 | ← | ← | ← | -126 |
| 00000010 | 02 | 2 | ← | ← | ← | -125 |
| 00000011 | 03 | 3 | ← | ← | ← | -124 |
| 00000100 | 04 | 4 | ← | ← | ← | -123 |
| 00000101 | 05 | 5 | ← | ← | ← | -122 |
| 00000110 | 06 | 6 | ← | ← | ← | -121 |
| 00000111 | 07 | 7 | ← | ← | ← | -120 |
| 00001000 | 08 | 8 | ← | ← | ← | -119 |
| 00001001 | 09 | 9 | ← | ← | ← | -118 |
| 00001010 | 0A | 10 | ← | ← | ← | -117 |
| 00001011 | 0B | 11 | ← | ← | ← | -116 |
| 00001100 | 0C | 12 | ← | ← | ← | -115 |
| 00001101 | 0D | 13 | ← | ← | ← | -114 |
| 00001110 | 0E | 14 | ← | ← | ← | -113 |
| 00001111 | 0F | 15 | ← | ← | ← | -112 |
| 00010000 | 10 | 16 | ← | ← | ← | -111 |
| 00010001 | 11 | 17 | ← | ← | ← | -110 |
| 00010010 | 12 | 18 | ← | ← | ← | -109 |
| 00010011 | 13 | 19 | ← | ← | ← | -108 |
| 00010100 | 14 | 20 | ← | ← | ← | -107 |
| 00010101 | 15 | 21 | ← | ← | ← | -106 |
| 00010110 | 16 | 22 | ← | ← | ← | -105 |
| 00010111 | 17 | 23 | ← | ← | ← | -104 |
| 00011000 | 18 | 24 | ← | ← | ← | -103 |
| 00011001 | 19 | 25 | ← | ← | ← | -102 |
| 00011010 | 1A | 26 | ← | ← | ← | -101 |
| 00011011 | 1B | 27 | ← | ← | ← | -100 |
| 00011100 | 1C | 28 | ← | ← | ← | -99 |
| 00011101 | 1D | 29 | ← | ← | ← | -98 |
| 00011110 | 1E | 30 | ← | ← | ← | -97 |
| 00011111 | 1F | 31 | ← | ← | ← | -96 |
| 00100000 | 20 | 32 | ← | ← | ← | -95 |
| 00100001 | 21 | 33 | ← | ← | ← | -94 |
| 00100010 | 22 | 34 | ← | ← | ← | -93 |
| 00100011 | 23 | 35 | ← | ← | ← | -92 |
| 00100100 | 24 | 36 | ← | ← | ← | -91 |
| 00100101 | 25 | 37 | ← | ← | ← | -90 |
| 00100110 | 26 | 38 | ← | ← | ← | -89 |
| 00100111 | 27 | 39 | ← | ← | ← | -88 |
| 00101000 | 28 | 40 | ← | ← | ← | -87 |
| 00101001 | 29 | 41 | ← | ← | ← | -86 |
| 00101010 | 2A | 42 | ← | ← | ← | -85 |
| 00101011 | 2B | 43 | ← | ← | ← | -84 |
| 00101100 | 2C | 44 | ← | ← | ← | -83 |
| 00101101 | 2D | 45 | ← | ← | ← | -82 |
| 00101110 | 2E | 46 | ← | ← | ← | -81 |
| 00101111 | 2F | 47 | ← | ← | ← | -80 |
| 00110000 | 30 | 48 | ← | ← | ← | -79 |
| 00110001 | 31 | 49 | ← | ← | ← | -78 |
| 00110010 | 32 | 50 | ← | ← | ← | -77 |
| 00110011 | 33 | 51 | ← | ← | ← | -76 |
| 00110100 | 34 | 52 | ← | ← | ← | -75 |
| 00110101 | 35 | 53 | ← | ← | ← | -74 |
| 00110110 | 36 | 54 | ← | ← | ← | -73 |
| 00110111 | 37 | 55 | ← | ← | ← | -72 |
| 00111000 | 38 | 56 | ← | ← | ← | -71 |
| 00111001 | 39 | 57 | ← | ← | ← | -70 |
| 00111010 | 3A | 58 | ← | ← | ← | -69 |
| 00111011 | 3B | 59 | ← | ← | ← | -68 |
| 00111100 | 3C | 60 | ← | ← | ← | -67 |
| 00111101 | 3D | 61 | ← | ← | ← | -66 |
| 00111110 | 3E | 62 | ← | ← | ← | -65 |
| 00111111 | 3F | 63 | ← | ← | ← | -64 |
| 01000000 | 40 | 64 | ← | ← | ← | -63 |
| 01000001 | 41 | 65 | ← | ← | ← | -62 |
| 01000010 | 42 | 66 | ← | ← | ← | -61 |
| 01000011 | 43 | 67 | ← | ← | ← | -60 |
| 01000100 | 44 | 68 | ← | ← | ← | -59 |
| 01000101 | 45 | 69 | ← | ← | ← | -58 |
| 01000110 | 46 | 70 | ← | ← | ← | -57 |
| 01000111 | 47 | 71 | ← | ← | ← | -56 |
| 01001000 | 48 | 72 | ← | ← | ← | -55 |
| 01001001 | 49 | 73 | ← | ← | ← | -54 |
| 01001010 | 4A | 74 | ← | ← | ← | -53 |
| 01001011 | 4B | 75 | ← | ← | ← | -52 |
| 01001100 | 4C | 76 | ← | ← | ← | -51 |
| 01001101 | 4D | 77 | ← | ← | ← | -50 |
| 01001110 | 4E | 78 | ← | ← | ← | -49 |
| 01001111 | 4F | 79 | ← | ← | ← | -48 |
| 01010000 | 50 | 80 | ← | ← | ← | -47 |
| 01010001 | 51 | 81 | ← | ← | ← | -46 |
| 01010010 | 52 | 82 | ← | ← | ← | -45 |
| 01010011 | 53 | 83 | ← | ← | ← | -44 |
| 01010100 | 54 | 84 | ← | ← | ← | -43 |
| 01010101 | 55 | 85 | ← | ← | ← | -42 |
| 01010110 | 56 | 86 | ← | ← | ← | -41 |
| 01010111 | 57 | 87 | ← | ← | ← | -40 |
| 01011000 | 58 | 88 | ← | ← | ← | -39 |
| 01011001 | 59 | 89 | ← | ← | ← | -38 |
| 01011010 | 5A | 90 | ← | ← | ← | -37 |
| 01011011 | 5B | 91 | ← | ← | ← | -36 |
| 01011100 | 5C | 92 | ← | ← | ← | -35 |
| 01011101 | 5D | 93 | ← | ← | ← | -34 |
| 01011110 | 5E | 94 | ← | ← | ← | -33 |
| 01011111 | 5F | 95 | ← | ← | ← | -32 |
| 01100000 | 60 | 96 | ← | ← | ← | -31 |
| 01100001 | 61 | 97 | ← | ← | ← | -30 |
| 01100010 | 62 | 98 | ← | ← | ← | -29 |
| 01100011 | 63 | 99 | ← | ← | ← | -28 |
| 01100100 | 64 | 100 | ← | ← | ← | -27 |
| 01100101 | 65 | 101 | ← | ← | ← | -26 |
| 01100110 | 66 | 102 | ← | ← | ← | -25 |
| 01100111 | 67 | 103 | ← | ← | ← | -24 |
| 01101000 | 68 | 104 | ← | ← | ← | -23 |
| 01101001 | 69 | 105 | ← | ← | ← | -22 |
| 01101010 | 6A | 106 | ← | ← | ← | -21 |
| 01101011 | 6B | 107 | ← | ← | ← | -20 |
| 01101100 | 6C | 108 | ← | ← | ← | -19 |
| 01101101 | 6D | 109 | ← | ← | ← | -18 |
| 01101110 | 6E | 110 | ← | ← | ← | -17 |
| 01101111 | 6F | 111 | ← | ← | ← | -16 |
| 01110000 | 70 | 112 | ← | ← | ← | -15 |
| 01110001 | 71 | 113 | ← | ← | ← | -14 |
| 01110010 | 72 | 114 | ← | ← | ← | -13 |
| 01110011 | 73 | 115 | ← | ← | ← | -12 |
| 01110100 | 74 | 116 | ← | ← | ← | -11 |
| 01110101 | 75 | 117 | ← | ← | ← | -10 |
| 01110110 | 76 | 118 | ← | ← | ← | -9 |
| 01110111 | 77 | 119 | ← | ← | ← | -8 |
| 01111000 | 78 | 120 | ← | ← | ← | -7 |
| 01111001 | 79 | 121 | ← | ← | ← | -6 |
| 01111010 | 7A | 122 | ← | ← | ← | -5 |
| 01111011 | 7B | 123 | ← | ← | ← | -4 |
| 01111100 | 7C | 124 | ← | ← | ← | -3 |
| 01111101 | 7D | 125 | ← | ← | ← | -2 |
| 01111110 | 7E | 126 | ← | ← | ← | -1 |
| 01111111 | 7F | 127 | ← | ← | ← | 0 |
| 10000000 | 80 | 128 | -128 | -127 | 0 | 1 |
| 10000001 | 81 | 129 | -127 | -126 | -1 | 2 |
| 10000010 | 82 | 130 | -126 | -125 | -2 | 3 |
| 10000011 | 83 | 131 | -125 | -124 | -3 | 4 |
| 10000100 | 84 | 132 | -124 | -123 | -4 | 5 |
| 10000101 | 85 | 133 | -123 | -122 | -5 | 6 |
| 10000110 | 86 | 134 | -122 | -121 | -6 | 7 |
| 10000111 | 87 | 135 | -121 | -120 | -7 | 8 |
| 10001000 | 88 | 136 | -120 | -119 | -8 | 9 |
| 10001001 | 89 | 137 | -119 | -118 | -9 | 10 |
| 10001010 | 8A | 138 | -118 | -117 | -10 | 11 |
| 10001011 | 8B | 139 | -117 | -116 | -11 | 12 |
| 10001100 | 8C | 140 | -116 | -115 | -12 | 13 |
| 10001101 | 8D | 141 | -115 | -114 | -13 | 14 |
| 10001110 | 8E | 142 | -114 | -113 | -14 | 15 |
| 10001111 | 8F | 143 | -113 | -112 | -15 | 16 |
| 10010000 | 90 | 144 | -112 | -111 | -16 | 17 |
| 10010001 | 91 | 145 | -111 | -110 | -17 | 18 |
| 10010010 | 92 | 146 | -110 | -109 | -18 | 19 |
| 10010011 | 93 | 147 | -109 | -108 | -19 | 20 |
| 10010100 | 94 | 148 | -108 | -107 | -20 | 21 |
| 10010101 | 95 | 149 | -107 | -106 | -21 | 22 |
| 10010110 | 96 | 150 | -106 | -105 | -22 | 23 |
| 10010111 | 97 | 151 | -105 | -104 | -23 | 24 |
| 10011000 | 98 | 152 | -104 | -103 | -24 | 25 |
| 10011001 | 99 | 153 | -103 | -102 | -25 | 26 |
| 10011010 | 9A | 154 | -102 | -101 | -26 | 27 |
| 10011011 | 9B | 155 | -101 | -100 | -27 | 28 |
| 10011100 | 9C | 156 | -100 | -99 | -28 | 29 |
| 10011101 | 9D | 157 | -99 | -98 | -29 | 30 |
| 10011110 | 9E | 158 | -98 | -97 | -30 | 31 |
| 10011111 | 9F | 159 | -97 | -96 | -31 | 32 |
| 10100000 | A0 | 160 | -96 | -95 | -32 | 33 |
| 10100001 | A1 | 161 | -95 | -94 | -33 | 34 |
| 10100010 | A2 | 162 | -94 | -93 | -34 | 35 |
| 10100011 | A3 | 163 | -93 | -92 | -35 | 36 |
| 10100100 | A4 | 164 | -92 | -91 | -36 | 37 |
| 10100101 | A5 | 165 | -91 | -90 | -37 | 38 |
| 10100110 | A6 | 166 | -90 | -89 | -38 | 39 |
| 10100111 | A7 | 167 | -89 | -88 | -39 | 40 |
| 10101000 | A8 | 168 | -88 | -87 | -40 | 41 |
| 10101001 | A9 | 169 | -87 | -86 | -41 | 42 |
| 10101010 | AA | 170 | -86 | -85 | -42 | 43 |
| 10101011 | AB | 171 | -85 | -84 | -43 | 44 |
| 10101100 | AC | 172 | -84 | -83 | -44 | 45 |
| 10101101 | AD | 173 | -83 | -82 | -45 | 46 |
| 10101110 | AE | 174 | -82 | -81 | -46 | 47 |
| 10101111 | AF | 175 | -81 | -80 | -47 | 48 |
| 10110000 | B0 | 176 | -80 | -79 | -48 | 49 |
| 10110001 | B1 | 177 | -79 | -78 | -49 | 50 |
| 10110010 | B2 | 178 | -78 | -77 | -50 | 51 |
| 10110011 | B3 | 179 | -77 | -76 | -51 | 52 |
| 10110100 | B4 | 180 | -76 | -75 | -52 | 53 |
| 10110101 | B5 | 181 | -75 | -74 | -53 | 54 |
| 10110110 | B6 | 182 | -74 | -73 | -54 | 55 |
| 10110111 | B7 | 183 | -73 | -72 | -55 | 56 |
| 10111000 | B8 | 184 | -72 | -71 | -56 | 57 |
| 10111001 | B9 | 185 | -71 | -70 | -57 | 58 |
| 10111010 | BA | 186 | -70 | -69 | -58 | 59 |
| 10111011 | BB | 187 | -69 | -68 | -59 | 60 |
| 10111100 | BC | 188 | -68 | -67 | -60 | 61 |
| 10111101 | BD | 189 | -67 | -66 | -61 | 62 |
| 10111110 | BE | 190 | -66 | -65 | -62 | 63 |
| 10111111 | BF | 191 | -65 | -64 | -63 | 64 |
| 11000000 | C0 | 192 | -64 | -63 | -64 | 65 |
| 11000001 | C1 | 193 | -63 | -62 | -65 | 66 |
| 11000010 | C2 | 194 | -62 | -61 | -66 | 67 |
| 11000011 | C3 | 195 | -61 | -60 | -67 | 68 |
| 11000100 | C4 | 196 | -60 | -59 | -68 | 69 |
| 11000101 | C5 | 197 | -59 | -58 | -69 | 70 |
| 11000110 | C6 | 198 | -58 | -57 | -70 | 71 |
| 11000111 | C7 | 199 | -57 | -56 | -71 | 72 |
| 11001000 | C8 | 200 | -56 | -55 | -72 | 73 |
| 11001001 | C9 | 201 | -55 | -54 | -73 | 74 |
| 11001010 | CA | 202 | -54 | -53 | -74 | 75 |
| 11001011 | CB | 203 | -53 | -52 | -75 | 76 |
| 11001100 | CC | 204 | -52 | -51 | -76 | 77 |
| 11001101 | CD | 205 | -51 | -50 | -77 | 78 |
| 11001110 | CE | 206 | -50 | -49 | -78 | 79 |
| 11001111 | CF | 207 | -49 | -48 | -79 | 80 |
| 11010000 | D0 | 208 | -48 | -47 | -80 | 81 |
| 11010001 | D1 | 209 | -47 | -46 | -81 | 82 |
| 11010010 | D2 | 210 | -46 | -45 | -82 | 83 |
| 11010011 | D3 | 211 | -45 | -44 | -83 | 84 |
| 11010100 | D4 | 212 | -44 | -43 | -84 | 85 |
| 11010101 | D5 | 213 | -43 | -42 | -85 | 86 |
| 11010110 | D6 | 214 | -42 | -41 | -86 | 87 |
| 11010111 | D7 | 215 | -41 | -40 | -87 | 88 |
| 11011000 | D8 | 216 | -40 | -39 | -88 | 89 |
| 11011001 | D9 | 217 | -39 | -38 | -89 | 90 |
| 11011010 | DA | 218 | -38 | -37 | -90 | 91 |
| 11011011 | DB | 219 | -37 | -36 | -91 | 92 |
| 11011100 | DC | 220 | -36 | -35 | -92 | 93 |
| 11011101 | DD | 221 | -35 | -34 | -93 | 94 |
| 11011110 | DE | 222 | -34 | -33 | -94 | 95 |
| 11011111 | DF | 223 | -33 | -32 | -95 | 96 |
| 11100000 | E0 | 224 | -32 | -31 | -96 | 97 |
| 11100001 | E1 | 225 | -31 | -30 | -97 | 98 |
| 11100010 | E2 | 226 | -30 | -29 | -98 | 99 |
| 11100011 | E3 | 227 | -29 | -28 | -99 | 100 |
| 11100100 | E4 | 228 | -28 | -27 | -100 | 101 |
| 11100101 | E5 | 229 | -27 | -26 | -101 | 102 |
| 11100110 | E6 | 230 | -26 | -25 | -102 | 103 |
| 11100111 | E7 | 231 | -25 | -24 | -103 | 104 |
| 11101000 | E8 | 232 | -24 | -23 | -104 | 105 |
| 11101001 | E9 | 233 | -23 | -22 | -105 | 106 |
| 11101010 | EA | 234 | -22 | -21 | -106 | 107 |
| 11101011 | EB | 235 | -21 | -20 | -107 | 108 |
| 11101100 | EC | 236 | -20 | -19 | -108 | 109 |
| 11101101 | ED | 237 | -19 | -18 | -109 | 110 |
| 11101110 | EE | 238 | -18 | -17 | -110 | 111 |
| 11101111 | EF | 239 | -17 | -16 | -111 | 112 |
| 11110000 | F0 | 240 | -16 | -15 | -112 | 113 |
| 11110001 | F1 | 241 | -15 | -14 | -113 | 114 |
| 11110010 | F2 | 242 | -14 | -13 | -114 | 115 |
| 11110011 | F3 | 243 | -13 | -12 | -115 | 116 |
| 11110100 | F4 | 244 | -12 | -11 | -116 | 117 |
| 11110101 | F5 | 245 | -11 | -10 | -117 | 118 |
| 11110110 | F6 | 246 | -10 | -9 | -118 | 119 |
| 11110111 | F7 | 247 | -9 | -8 | -119 | 120 |
| 11111000 | F8 | 248 | -8 | -7 | -120 | 121 |
| 11111001 | F9 | 249 | -7 | -6 | -121 | 122 |
| 11111010 | FA | 250 | -6 | -5 | -122 | 123 |
| 11111011 | FB | 251 | -5 | -4 | -123 | 124 |
| 11111100 | FC | 252 | -4 | -3 | -124 | 125 |
| 11111101 | FD | 253 | -3 | -2 | -125 | 126 |
| 11111110 | FE | 254 | -2 | -1 | -126 | 127 |
| 11111111 | FF | 255 | -1 | 0 | -127 | 128 |