https://origami-z.github.io/color-palette-generator/
A tool to visualize a set of colors on a saturation and brightness plot, which helps to determine whether the palette (on the same hue) will would nicely together.
Copy the red colors from MUI into "Hex values" input box
Use the top right panel to see some stats, and optionally drag the red dots on the plot to adjust then.
Contrast guide: the saturation and brightness values that result contrast ratio against both white and black to be grater than 4.5 at given hue value.