Stoplight
Also known as: Setsugekka , Red Knuckles , Hot Flamin Chilli , Snake Fruit
With its warm undertone, Stoplight (#DD1111) comes across as passionate and urgent. Designers reach for it in food branding and sale banners. Stoplight plays well with cyan tones. The harmonies below show which ones. It's dark enough to use for text on white backgrounds (5.04:1, passes WCAG AA).
Reference
Stoplight color codes
- HEX
- #DD1111
- RGB
- rgb(221, 17, 17)
- RGBA
- rgba(221, 17, 17, 1)
- HSL
- hsl(0, 86%, 47%)
- HSV
- hsv(0, 92%, 87%)
- CMYK
- cmyk(0%, 92%, 92%, 13%)
- LAB
- lab(47.7 71.2 57.6)
- OKLCH
- oklch(56.8% 0.227 28.6)
Analysis
Color intelligence
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Gamut
The full range of colors a device or space can show. sRGB is the common screen gamut; Display P3 is wider. A color outside a gamut cannot be shown accurately there and must be mapped inward.Full glossary entry →Displays accurately on every screen. Vivid colors like this typically lose some intensity in CMYK print. Request a physical proof for brand-critical work.
Temperature
Undertone
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warm
Nearest standard colors
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →- CSS: red #FF0000 · ΔE 7.2
- RAL 3028: Pure red #E72512 · ΔE 3.4 · approximate
RAL values are widely published approximations of the physical standard. For Pantone-adjacent workflows, match by eye against a physical fan deck. Pantone's values are proprietary and device-dependent, so we don't print lookups.
Where Stoplight works
- Web & UI: Use it directly for text on light surfaces; it clears AA contrast without adjustment.
- Interiors: Use it where you want the eye to land: a front door, built-ins, or one bold wall.
- Fashion: One garment in this color carries an outfit; two starts to compete.
- Branding: Commands attention in logos and packaging; balance it with generous neutral space.
- Web & UI: Reads as an interactive accent: fills, hovers, focus rings. Keep body text in a darker neutral.
- Branding: Best in a brand's supporting palette: packaging interiors, patterns, campaign accents.
Copy as: every ecosystem
Variations
Tints, shades, and tones of Stoplight
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →Tints (lighter)
Shades (darker)
Harmonies
Color harmonies
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →Palettes built from Stoplight by rotating its hue in OKLCH space. Click any swatch to copy its hex code.
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Monochromatic
Accessibility
Contrast & accessibility
Aa on white
contrast 5.04:1
AA pass AAA fail AA large pass
Aa on black
contrast 4.16:1
AA fail AAA fail AA large pass
Best text color on a Stoplight background: #ffffff
Palettes
Palettes featuring Stoplight
Stoplight with its complement
Soft neighbors of Stoplight
Stoplight triad
Explore
Similar colors
- Redsurrection #D90B0B · ΔE 1.2
- Mario #E4000F · ΔE 1.2
- Lifeguard #E50000 · ΔE 2.2
- Ferocious #E2261F · ΔE 2.6
- Boulevardier #D40701 · ΔE 2.7
- Fatal Fury #DA321C · ΔE 2.7
Looking for maximum contrast instead? The complement of Stoplight is closest to Cruising .
FAQ
Stoplight FAQs
What color is Stoplight?
Stoplight is a medium red with the hex code #DD1111. In HSL terms it has a hue of 0°, 86% saturation, and 47% lightness.
What is the hex code for Stoplight?
The hex code for Stoplight is #DD1111. In RGB it's rgb(221, 17, 17), and in CMYK it's cmyk(0%, 92%, 92%, 13%).
What colors go well with Stoplight?
Stoplight pairs naturally with cyan tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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