invert

Function Signature

invert(hex: string): string

Parameters

• hex (string): A HEX color string (e.g., #ff6600).

Return Value

A HEX color string representing the inverted color, always in the format #rrggbb.

invert("#ffffff");
// "#000000"

invert("#000000");
// "#ffffff"

invert("#ff6600");
// "#0099ff"

Examples

// Invert bright blue
console.log(invert("#00aaff"));
// "#ff5500"

// Invert gray
console.log(invert("#808080"));
// "#7f7f7f"

Implementation Details

• Converts the HEX input into RGB values using hexToRgb.
• Each channel is inverted with 255 - value.
• The result is converted back into HEX with rgbToHex.

Usage Notes

• Inverting twice returns the original color.
• Useful for generating contrasting colors for backgrounds and text.
• Produces a mathematically exact inverse, not a perceptual complement.