The patch adds a color interpolation in the HSL color model to the BColor tools and extends the 'Duplicate' dialog to include these new color interpolations. This patch also solves bug tdf#173142. Change-Id: Ie7f15d65f20b6a8d116c2ac03a57540e6be25ae1 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209366 Tested-by: Jenkins Reviewed-by: Jonathan Clark <jonathan@libreoffice.org> Reviewed-by: Regina Henschel <rb.henschel@t-online.de>