Articles
Practical guides for SmartPlusLab online tools.
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How to Convert HEX Color to RGB and HSL
Convert HEX color codes to RGB and HSL values instantly. Learn how to format inputs, interpret channel breakdowns, and calculate color brightness accurately.
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How to Generate a Color Palette From a Base Color
Enter a hexadecimal base color, choose a supported palette type, and request 3 to 12 colors. The generator returns a coordinated palette in lowercase six-digit hexadecimal format when the inputs are recognized.
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How to Find the Name of a Hex Color
Enter a hexadecimal color value, submit it, and read the exact or nearest palette name returned. If the field is empty, the tool analyzes `#3498db` by default.
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How to Mix Two Colors With a Color Mixer
Enter two supported color values, choose a ratio from `0` to `1`, and start the calculation. When both inputs parse successfully, Color Mixer returns mixed, multiply, and screen hexadecimal values together with an RGB-formatted mixed value.
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How to Generate Color Harmonies
Enter a hexadecimal RGB color, select a recognized harmony type, and submit the inputs to receive a normalized base color with generated harmony colors. When both fields are empty, the defaults are `#3498db` and `complementary`.
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How to Convert HEX, RGB, and HSL Colors
Enter a HEX, RGB, or HSL color, select its supported lowercase source format, and submit it. A successful conversion returns HEX, RGB, and HSL values, numeric components, and a preview.
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How to Check Contrast Ratio Between Text and Background Colors
Enter supported foreground and background colors, run the comparison, and review the rounded ratio plus its four threshold assessments for normal and large text.
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How to Use a Color Blindness Simulator for Hex Colors
Enter an optional hexadecimal color, run the simulation, and compare its three transformed color views with the grayscale rendering. If you leave the input empty, the tool uses `#ff0000`.
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How to Calculate a Circle's Radius, Diameter, Circumference, and Area
Enter exactly one positive radius, diameter, circumference, or area value. The calculator returns the circle's four standard measures, with calculated numbers rounded to six decimal places.
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How to Calculate a Checksum from Text
Enter your text, choose an available hash algorithm, and run the calculation to receive a hexadecimal checksum. You can request one checksum or the six listed values together; empty text returns no checksum values.
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How to Use a Calorie Calculator for Daily Calorie Estimates
Enter age, weight, height, gender, and activity level to receive rounded estimates for basal metabolic rate and total daily energy expenditure. If you leave the inputs unchanged, the calculator uses its stated default values.
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How to Use a Caesar Cipher to Encode and Decode Text
Enter text and an integer shift, then choose encryption or the exact `decrypt` mode. The shift defaults to 3, while case and non-alphabetic characters remain unchanged.