About HEX to HSL
Rather than asking you to adapt a general-purpose app, HEX to HSL is organised around hexadecimal values. It accepts a colour value, picker choice, or image, works to converts one representation into another with a clearly labelled result, and makes usable colour values and visual guidance available when design decisions, palettes, gradients, and accessibility checks.
Hexadecimal notation is kept distinct from decimal or binary representation. Taken together, these details make HEX to HSL suitable for design decisions, palettes, gradients, and accessibility checks.