WPFColorLib

This library is created for "WPF/.NET FW 4.8" and intended to work with colors.

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Standard WPF lacks of color selection dialog and WPFColorLib fills this niche with brand new approach:

Description of functionality:

• First, user selects desirable Hue level using top slider
• Saturation/Luminosity gradient below shows color variations of current hue
• Clicking/moving mouse on gradient selects one specific color (and button OK become enabled) and its RGB value is reflected in Hex and Dec fields below. Contrast circle on gradient shows the place of selection
• Right from "New color" block there is "Old color" if dialog was called with some original color (to compare)
• Each value, hex or dec, can be typed directly (and confirmed with Enter) or pasted from Clipboard (using button on the left of the field)

  Note that pasted text can be any free text taken from CSS, for example. Strings like #p1 {background-color: #ff0000;} /* red */ will be correctly parsed, catchig first matching RGB hex value (here ff0000)

• Right from Dec/Hex fields there is ❍ (copy to Clipboard) button. Old color also can be copied
• Once color is selected, "Luminosity palette" is filled with 11 variations of current color, where H/S is the same and "Luminosity" level vary from 0 to 100 with step 10 - these samples also can be selected
• Selected color can be added to "Favorite colors", clicking on ⊕ button right from color sample
• When you click with left mouse button on "Favorite color" sample, its color become selected. Right click deletes this sample
• "Favorite colors" also can be generated: right click on favorite area and select 16-color Apple's palette or click "Standard 6 level" to generate 216-colors palette, where each color has 6-level variations of RGB components /easier to try than explain :) /. From the same popup you can clear favorites
• "Favorite colors" are saved between dialog calls, but lost when you exit application

Usage:

Install "Awesome Font v5". Reference necessary DLLs: System.Memory, System.Buffers and System.Runtime.CompilerServices.Unsafe. Try sample:

var dlg = new SelectColorDlg(Colors.Bisque) { Owner = this };
if (dlg.ShowDialog() == true) {
    var color = dlg.SelectedColor;// as Color struct
    var brush = dlg.SelectedBrush;// the same, but as SolidColorBrush
}

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WPFColorLib also contains a few helpers in a static class ClrHlp:

• ColorToHSL - convert Color struct to (H, S, L) presentation (H=0..359, S=0..100, L=0..100)
• Hex2color - takes free text with hex RGB presentation and returns created Color
• Color2hex - takes Color and returns hex RGB presentation
• Hex2Byte - parse hex byte presentation to native byte type
• HSL2RGB - convert (H,S,L) color to its RGB presentation (as array of 3 ints)
• HSL2RGBInt - the same as HSL2RGB, but returns RGB components packed into integer