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In other words, when client code wants a color from the ColorRamp, they must provide a parametric value which is then mapped into the ColorPalette.ДЄdditionally, my implementation includes a RampType flag that indicates whether it will behave as a gradient or whether it will round (up or down) to the nearest neighboring color in the palette. It treats the ColorPalette as its own color subspace that can be accessed via a parametric value in the range of. The ColorRamp class also operates on a given ColorPalette. This class useful when you have a group of items but want to limit their color choices to a certain set of colors (which may or may not be equal to the number of items): build a palette with your desired set of colors and then use a ColorRing when performing the color assignment. Each time client code calls GetColor(), the current color is returned and the current color index is increased (wrapping back to 0 if it passes the last color).

(h:0.0f, s:0.9f, v:0.95f)ДЄ ColorRing is a simple wrapper class that operates on a given ColorPalette, treating it like a circular list.

Bolds: a generated set of saturated colors.

Pastels: a generated set of pastel colors.

Spectrum: a set of bands between two colors.

Monochrome: single color spectrum (more precisely: a spectrum from black to a single color).

Rainbow: Red, Orange, Yellow, Green, Cyan, Blue, Violet.

Prefab Color PalettesДЄs a convenience, I have a set of ColorPalette creation routines (listed and respectively displayed in the image below). Although this class seems trivial, it serves as a basis for a couple really cool constructs. I call it a вЂњpaletteвЂќ because it stores a fixed array of colors that are not assumed to be associated with each other in any particular way (order doesnвЂ™t matter, etc.). The array of colors is set on construction, and each individual color can be accessed via the bracket operator. The ColorPalette class is a named container of colors.

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Instead, I simply have a single HsvColor that stores the state of the generator between calls to Generate(). ItвЂ™s important to note that the colors are not pre-generated and stored. MHsvColor.H = MathCore::Wrap(nextHue, 0.0f, 1.0f) The Generate() routine below uses the cInvGoldenRatio constant as the hue increment.Д¬onst float nextHue = mHsvColor.H + cInvGoldenRatio The saturation and value components are kept constant during generation, while the hue is rotated around the HSV color cylinder using the golden ratio.Д¬onst float cInvGoldenRatio = 0.618033988749895f Internally, it uses the HSV color-space to generate a new unique color each time Generate() is called. As a result, I found a couple of different articles on the subject (see References below) and implemented my own lightweight ColorGenerator class. Instead I wanted to be able to generate a list of colors for an arbitrary size depending upon the requirements of the code. Using random number generators produces poor color sequences, and I didnвЂ™t want to limit myself to a hand-picked list of вЂњgoodвЂќ colors. Generating a good sequence of unique colors is not as trivial as it sounds. The main purpose for the HsvColor is to use it as a vehicle for color computation as opposed to storage. Just be sure to convert your hue appropriately when implementing your RgbToHsv() and HsvToRgb() routines.ДЇurthermore, donвЂ™t be troubled that this object is a bit more heavyweight than the Color32. I like to keep hue in the same range as the other components, but thatвЂ™s just a personal preference. It is important to note that the HSV color-space is actually a cylinder, and the hue component is actually an angular value. HsvColor contains four float components: hue (H), saturation (S), value (v), alpha (A). However, converting from RGB to other color-spaces (and back) is very important because some color operations are more natural in other color-spaces.ДЇor the purpose of this article, we will concentrate on Hue-Saturation-Value (HSV). RGB is so ubiquitous because itвЂ™s the color-space that rendering API calls expect for their color inputs. Also, a Color32 can be specified from four floats (range: ), though the component values are immediately converted to the byte representation. The class only has a small set of member functions for clamping, linear interpolation between two colors, etc. Color32 is a simple 32-bit color structure with four 8-bit unsigned integer components: red (R), green (G), blue (B), alpha (A). In this article, IвЂ™d like to share some code and insights for a few constructs I find really useful in everyday development. In my current code base, I have a whole library dedicated to Color. In fact, one of my first posts I ever wrote for my developer website was based on setting up color printing for console output (which is super useful for distinguishing errors from normal informational output).