Contrast C
Contrast C
Difference in luminance factors of the graphical symbol and its background, divided by the larger luminance factor βa, where βb is the smaller luminance factor.
C = (βa – βb) / βa
- Document
- ISO
- Context
- International Standard
- Origin document
ISO 3864-4:2011(en) Graphical symbols — Safety colours and safety signs — Part 4: Colorimetric and photometric properties of safety sign materials
- Reference Link
- Release