Using the above image I made a swatch of 4 colors
#903DB3 - #B651C7 - #F099DE - #F9E6FA
I made a gradient tile using all the colors in the swatch.
I made a seamless tile using the second lightest color.
The seamless tile was made using Paint Shop Pro and the Eye Candy - Swirl plugin.
I then made it seamless using 2020 plugin.