I believe the dark blue ribbon represents Colon Cancer Geoff.. or if it's lighter blue Prostate. Mixing colours.. where would it end??? Not sure why they just don't cover it all with their yellow flower and it's colour.
Dark Blue Ribbons: Colon Cancers
Gold Ribbons: Childhood Cancer
Gray Ribbons: Diabetes & Brain Cancer
Green Ribbons: Kidney Cancer
Green/Blue Ribbons: Mental Health Awareness
Jade Ribbons: Liver Cancer & Hepatitis
Jigsaw Puzzle Ribbons: Autism
Lace Ribbons: Osteoporosis
Lime Green Ribbons: Lymphoma, Lyme Disease
Orange Ribbons: Leukemia, Multiple Sclerosis
Periwinkle Ribbons: Hypertension & Stomach Cancer
Pearl Ribbons: Lung Cancer
Pink Ribbons: Breast Cancer
Pink, Purple & Teal: Thyroid Cancer
Purple Ribbons: Testicular Cancer, Pancreatic Cancer, Eating Disorders
Red Ribbons:AIDS/HIV, Heart Disease
Silver Ribbons: Parkinson's Disease
Sky Blue Ribbons: Prostate Cancer
Teal Ribbons: Ovarian Cancer
Yellow: Bladder Cancer
White Ribbons: Bone Cancer