Colour story
Where this came from.
PETROL with fabrics A and F exchanged, by Allison in Colour Lab on 2026-09-04: the amber sliver becomes the ground and the black ground becomes the sliver.
SWAPPED. Every colour is PETROL's own; only two changed places.
Where each colour came from
-
Fabric A
#BC6D1CPETROL's amber, moved from the 4.3% accent to the ground at 50.2%. -
Fabric B
#DAC9B3PETROL's cream, unchanged on fabric B. -
Fabric C
#334C48PETROL's deep teal, unchanged on fabric C. -
Fabric D
#C7B49CPETROL's tan, unchanged on fabric D. -
Fabric E
#252C2BPETROL's charcoal, unchanged on fabric E. -
Fabric F
#090909PETROL's black, moved from the ground to fabric F, the accent sliver.
What it does to the seams
Checked against all 14 fabric pairs weighted by how much seam length each actually shares in this quilt. 2.4% of the seam length falls below 1.25 contrast: the cream against the tan at 1.24, the same pair PETROL itself loses, because the swap did not touch either. Only 4.0% of the seams are soft at all; the amber ground reads against everything it meets.
- Seams that will not read
- 2.4%
- Soft seams
- 4.03%
- Lightness range
- 74
- Reads as
- Shapes
- 3 of the 6 fabrics are dark. Two darks compete; one dark punctuates.
- B-D carries 2.36% of the quilt's seams at contrast 1.24 — those seams will not read.
Contrast is measured on screen colours, not on fabric. It tells you where the piecing will disappear, not which bolt to buy.
