How Many Hex Colors Are There?
In standard #RRGGBB notation, there are 256^3 color combinations available, or 16,777,216. This is because each color value RR, GG, BB can contain 256 different values, ranging from 00 to FF. Therefore, the number of combinations is 256^3.
An interesting side note is that many modern browsers will also support transparency. This means that an entirely new set of color codes exists in the form of #AARRGGBB. In this instance, there are 4,294,976,296 color codes, or 256^4. It’s important to keep in mind that the addition of the transparency does not indicate that there are extra colors, since solely adding transparency does not change the color. This merely adds more information and more available color codes depending on transparency, or the level of opacity.
How Do Hex Colors Work?
Hexadecimal colors use sixteen different values to represent a single shade of color, whether it be red, green, or blue. This is powerful because it gives you a broad range of shades for each color – specifically sixteen. Each color is broken down into a number or character, ranging from 0-9 and A-F, where 0 is the minimum value and F is the maximum. Next, the color format is separated into #RRGGBB, where RR is red, GG is green, and BB is blue.
What is HSL?
HSL (Hue, Saturation, Lightness) is the color representation. It is user-friendly because without a big knowledge, you can imagine how specific color looks like. Hue is one pure pigment — without any tint or shade. Color saturation is about intensity. Lightness is about how light color is.
The HSL color model is used in numerical color specifications. The advantage of HSL over RGB is that it is far more intuitive: you can guess at the colors you want, and then tweak.
HSL Color Values
Hue is a degree on the color wheel from 0 to 360. 0 is red, 120 is green, and 240 is blue. Saturation is a percentage value, 0% means a shade of gray, and 100% is the full color. Lightness is also a percentage value, 0% is black, and 100% is white.
The RGB (red, green, blue) color model is the most popular way to mix and create colors. If you deal with commercial printers, you know about CMYK (cyan, magenta, yellow, key). You might have noticed HSV (hue, saturation, value) in the color picker of your graphics software.
Unlike RGB and CMYK, which use primary colors, HSV is closer to how humans perceive color. It has three components: hue, saturation, and value. This color space describes colors (hue or tint) in terms of their shade (saturation or amount of gray) and their brightness value. Some color pickers, like the one in Adobe Photoshop, use the acronym HSB, which substitutes the term "brightness" for "value," but HSV and HSB refer to the same color model.
Uses of HSV
Designers use the HSV color model when selecting colors for paint or ink because HSV better represents how people relate to colors than the RGB color model does.
The HSV color wheel also contributes to high-quality graphics. Although less well-known than its RGB and CMYK cousins,
Selecting an HSV color begins with picking one of the available hues and then adjusting the shade and brightness values.