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Course: Pixar in a Box > Unit 5
Lesson 1: Introduction to colorHSL color model
Hue, saturation, and light (HSL) is another color selection model Pixar artists use. The color wheel helps to choose hue and saturation, and lightness can be adjusted with a slider. Compare HSL to the RGB color model and learn how it simplifies color selection for a more user-friendly experience.
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Are RGB and HSL two different ways of completely representing one color? Do you have to define both of them to get a color, or is saying the HSL enough to completely say any color you want?(15 votes)
The RGB model allows you to mix color i.e. red, green and blue to result in a new color.
The HSL model focuses on allowing you to adjust the brightness and saturation of a color.
They both are able to be converted to each other.
Here is a converter http://www.rapidtables.com/convert/color/hsl-to-rgb.htm(16 votes)
why don't they use the three primary colors instead of red, green, and yellow?(4 votes)
At1:27, the video states that gray is made of the equal amount of all colors. Remembering this, how would create black and white?(4 votes)
Make grey and then turn the lightness up or down to make white or black(7 votes)
Is this color wheel in the HSL model also being used to represent CMYK?(3 votes)- No it will not.
The CMYK model looks more like a Venn diagram with cyan, magenta, and yellow
The center will be black(4 votes)
This is the best class to take in life.(3 votes)
hears1:29automaticity starts songs “Gray street” by Dave Mathews(3 votes)
Does our eyes use the RGB OR the HSL color model.(2 votes)
Well, it's not really the same as pixels, but humans have 3 color-sensitive cones. One detects red, one for green, and one for blue, so basically, we use the RGB model, but we use specialized cells instead of pixels. Hope this helped!(1 vote)
what is the difference in LIGHTNESS and VALUE (as in HSL and HSV respectively)(1 vote)
Are there other sorts of colour finding systems like, RGB, HSL, and CYMK?(0 votes)
YUV is the color system used in televisions. Y is the luminance signal; U and V are "chrominance." They carry portions of the color. This system was invented in order to make color television signals compatible with older black-and-white TV sets. Several variants of the YUV scheme exist (YIQ, YCbCr, YPbPr), and although they're not actually compatible mathematically, they're similar in function.
LAB color is used in scientific applications where addressing colors that are outside of the human visual range might be important. It is very precise but not common.
XYZ color, similar to RGB, is designed to simulate the behavior of our eyes. It's probably the oldest scientific color model, developed in the early 1930's.
There are also color matching systems like Pantone, where exact colors can be produced by referring to them by name or number. This isn't properly a color model, but it's very commonly used by graphic artists to specify colors to be used in print.
And there are variants on all of the color models mentioned. The Munsell system, for instance, is an early form of HSL. Munsell was a painter and art teacher in the early 1900's who wrote several books about color.(4 votes)
How do this and the RGB model compare to the CYMK model used in printing?(0 votes)
The primary difference between RGB and CMYK is that RGB is additive, which means that the components add up to emit white, and CMYK is subtractive, which means that the components add up to absorb all light—making black. They have a different gamut, which describes the range, or variety, of colors that can be described using that color model. Here's a good overview of the difference: https://support.dma.ucla.edu/help/tutorials/print_color_guide.pdf (It gets a bit technical as you go, but the first page is good!)(3 votes)
1:27Video transcript
(metal clattering) - You've just seen how any color can be represented by blending together different amounts of three colors, red, green and blue. For example, the RGB
value of this gold color is 100% red, slightly less green, and no blue, but as you may have noticed
in the previous exercise, it's fairly difficult to
find the correct RGB values to match a desired color. So artists have developed new ways to specify colors in a more intuitive way. One popular method they use is called HSL, short for hue, saturation, and lightness, similar to the HSV we saw earlier. Artists use a tool called a color wheel to pick the hue and saturation they like. Hue is what we normally call color, is based on the position
around this wheel, such as this red. Saturation defines how pure a color is, and saturation is based on the distance from the center of this wheel. If we want to desaturate, we move inward, and if we want to saturate, we move outward. For example, to saturate
this shade of red, we remove any contribution
of green and blue, whereas to desaturate it, we instead increase the contribution of green and blue. Taken to the extreme,
this trends towards grey because the three color
contributions are equal. So at full desaturation, our red becomes achromatic, or colorless. If an artist wants to use a strong yellow, they first have to find
the yellow hue they want. Then they move in the radial direction to saturate or desaturate it. Finally, there is lightness, which is adjusted using a separate slider. For example, we can take our yellow from very low lightness like this to a very high lightness like this. You can already see
that this is a much more intuitive way of finding colors compared to using RGB values. Okay, let's pause here so you can get the hang
of HSL color selection in the next exercise.