Complementary
Maximum contrast — logos, CTAs, bold pairs
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Reds
International Orange (Engineering)
Psychology
It commands attention and signifies urgency or critical importance, stimulating alertness and a sense of immediate action.
History & Origin
International Orange is not one single color. This engineering variant (#BA160C) is codified in U.S. Federal Standard 595 (FS 12197) as a vivid red for safety equipment and industrial marking. The Golden Gate Bridge and aerospace variants are distinctly more orange and have their own library entries.
Combinations
Harmonious pairings from this color. Click any swatch to copy.
Values & Conversions
Copy any format — sRGB, print, and perceptual OKLCH.
CSS
Accessibility
WCAG 2.2 contrast for the pairings designers use most.
Recommended
Readable body text at this size.
6.55:1AA
Use white text for body copy, labels, and controls.
✓ Small text✓ Large text
All pairings
Aa
White on color
6.55:1AA
Aa
Black on color
3.21:1AA Large
Aa
Color on white
6.55:1AA
Aa
Color on black
3.21:1AA Large
Variations
Shades, tints, and tones in 10% steps — built for real UI states.
Darker steps for hover, shadow, and pressed states.
Design token scale
50–950 ramp for systems workColor vision
How this color reads under common forms of color vision deficiency.
Similar colors
Perceptually closest named colors in the library.