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The first number is 0, and you count all the way up to the last digit. These 256 colors are represented as the values 0 – 255.Ĭounting is done the same way in both systems. By using a hexadecimal, or 16-bit number system, the maximum number of colors that can be displayed at any one time is 16 x 16, or 256 colors. Note: This also explains why the highest value possible in the RGB system is 255. The 16 characters used are the numbers 0 – 9, and the letters A – F. The hexadecimal number system is a Base-16 system, meaning there are 16 unique characters used to define the numbers.
#3 letter css color codes code
Hex color code values, in comparison, are based on the hexadecimal number system. The 10 characters used are the numbers 0 – 9. The decimal number system is a Base-10 system, meaning there are 10 unique characters used to define the numbers. RGB color code values are based on the number system we are most familiar with, the decimal number system. While none of these are likely to make a significant impact on the development process, you may find yourself wanting to switch to hex color codes at some point – so, how does one switch from an RGB color code to a hexadecimal color code? Converting RGB to Hex Color Codes
#3 letter css color codes full
Hex color codes can also become even more compact by using only three digits for some colors, rather than the full six digits. They are more compact, and therefore are better for minimized code.While the choice between which of these color naming conventions to use comes down to a matter of personal preference, there are several advantages to using hex color codes: They are written in a slightly different way: color: #000000 /* black */ Hex color codes actually use the same principle as RGB color codes, as they both define colors using the RGB color mode. In traditional color theory, all other colors can be derived from combinations of these three, and it was thought that these three colors could not be formed by a mix of any other colors. RGB gets its name from the primary colors red, green, and blue. They are written in the following way: color: rgb(0, 0, 0) /* black */ RGB color codes, sometimes referred to as RGBA color codes when they include an additional value for an alpha channel, are one of the most popular ways to define colors in webpages. However, today we will be talking about the two most popular color naming conventions, RGB color codes and hexadecimal (hex) color codes. Some people use supported color keywords, while other people use a more specific color system such as HSL (hue, saturation, lightness). Using the rgb functional notation should be the fastest color value to convert.Īnyway – I guess no one use enough colors to make a notable difference and using the rgb functional notation would make the style sheet a few extra bytes per color… I'll stick to lowercase and shorthand for a while.Since the earliest days of web development, there have been ways to specify colors in backgrounds, borders, fonts, and other elements.
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I figure the shorthand conversion cost more than converting from a six character hexadecimal value. What's best for the page visitor? I began to calculate the cpu cost of the conversion from the string value read by the browser, to a rgb datatype value used to for the actual output on the screen. Now I just had to find a standard telling me whether upper- or lowercase representation of A-F should be used and my quest would be over. The value of A should be 0A if it's hexadecimal. My first thought was that the shorthand notation is illogic, since A isn't the same value as AA. While I was reading the comments I began to wonder which one is most correct. I use lowercase and shorthand when possible.