#CF0003 Hex Color
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#cf0003 is a high-intensity red that commands immediate attention through its sheer saturation. This bold shade is too aggressive for large backgrounds, but it excels as a 10% accent color for calls to action or alert notifications. It pairs surprisingly well with dark slate grays to balance its natural heat. White text offers excellent 5.7:1 contrast against this hex code for readable UI elements.
Questions about #cf0003
What is #cf0003 in RGB, HSL and CMYK?
In RGB, #cf0003 is rgb(207, 0, 3), in HSL hsl(359, 100%, 41%) and in CMYK 0%, 100%, 99%, 19%.
How should I use #cf0003 in a UI design?
#cf0003 is far too aggressive for large backgrounds, so keep it strictly to small UI elements like CTA buttons or critical error alerts. Pairing it with dark slate grays helps tame its natural heat while maintaining a balanced, modern visual hierarchy.
Is #cf0003 readable on white or black?
#cf0003 has a 5.74:1 contrast ratio on white and 3.65:1 on black. WCAG asks for 4.5:1 for body text and 3:1 for large text, so on white it works for body text and on black it works only for large text (24px, or 18.5px bold). Try other pairs in the contrast checker.