Blue and Indigo

CSS Variables

:root {
  --color-a: #0000FF;
  --color-b: #380282;
  --color-a-rgb: 0, 0, 255;
  --color-b-rgb: 56, 2, 130;
}

JSON

{
  "name": "Blue and Indigo",
  "colors": [
    {
      "name": "Blue",
      "hex": "#0000FF",
      "rgb": [
        0,
        0,
        255
      ]
    },
    {
      "name": "Indigo",
      "hex": "#380282",
      "rgb": [
        56,
        2,
        130
      ]
    }
  ],
  "harmony": "Contrasting",
  "contrastRatio": 1.63
}

Do blue and indigo go together?

Yes. Blue and Indigo 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 1.63:1, which is below the AA threshold for text — use it for decorative purposes rather than text readability.

What is the contrast ratio between blue and indigo?

The WCAG 2.1 contrast ratio between Blue (#0000FF) and Indigo (#380282) is 1.63:1. This ratio is below AA. Use the pairing for backgrounds, borders, and decorative elements rather than text-on-background combinations.

How do I use blue and indigo 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 blue and indigo?

Blue has the hex code #0000FF and RGB values rgb(0, 0, 255). Indigo has the hex code #380282 and RGB values rgb(56, 2, 130). You can copy these directly into CSS or use the design tokens provided on this page.