Change the Hue, Saturation and Luminance properties of a colour without switching to another colour space.

The $\Delta H$ input is an angle value added to the hue of the input colour, giving the output colour a hue value of $H_0+\Delta H$. The final hue automatically wraps around the $[0,360]$ range.

The numeric ranges of $\Delta S$ and $\Delta L$ are both $[-1,+1]$. However, even $\Delta$ values close to zero may result in maximal possible changes, depending on the input colour. E.g., a colour which is already almost desaturated, will reach zero saturation with even a small negative $\Delta S$.

Note that input colours with zero saturation or luminance may not behave as expected when saturation or luminance are increased. Whether or not the adjustment is well-behaved will depend on the space in which the original colour is defined.