Red and Yellow

CSS Variables

:root {
  --color-a: #FF0000;
  --color-b: #FFFF00;
  --color-a-rgb: 255, 0, 0;
  --color-b-rgb: 255, 255, 0;
}

JSON

{
  "name": "Red and Yellow",
  "colors": [
    {
      "name": "Red",
      "hex": "#FF0000",
      "rgb": [
        255,
        0,
        0
      ]
    },
    {
      "name": "Yellow",
      "hex": "#FFFF00",
      "rgb": [
        255,
        255,
        0
      ]
    }
  ],
  "harmony": "Contrasting",
  "contrastRatio": 3.72
}

Do red and yellow go together?

Yes. Red and Yellow form a contrasting color combination. These colors sit far enough apart on the wheel to create clear contrast without falling into a named harmony. The pairing works through difference rather than relationship, which suits designs that want variety over cohesion. The pairing has a WCAG contrast ratio of 3.72:1, which passes AA for large text but not for body text.

What is the contrast ratio between red and yellow?

The WCAG 2.1 contrast ratio between Red (#FF0000) and Yellow (#FFFF00) is 3.72:1. This passes AA for large text (18pt+ or 14pt+ bold) but not for normal-sized body text.

How do I use red and yellow in design?

A safe starting point is the 60/30/10 rule: give one color about 60 percent of the surface area, the other about 30 percent, and reserve the remaining 10 percent for an accent or neutral. If one color is significantly darker, use it for text or structural elements and the lighter one for backgrounds. Test the result with our Contrast Checker if text is involved.

What are the hex and RGB values for red and yellow?

Red has the hex code #FF0000 and RGB values rgb(255, 0, 0). Yellow has the hex code #FFFF00 and RGB values rgb(255, 255, 0). You can copy these directly into CSS or use the design tokens provided on this page.