Blue and Sienna

CSS Variables

:root {
  --color-a: #0000FF;
  --color-b: #A9561E;
  --color-a-rgb: 0, 0, 255;
  --color-b-rgb: 169, 86, 30;
}

JSON

{
  "name": "Blue and Sienna",
  "colors": [
    {
      "name": "Blue",
      "hex": "#0000FF",
      "rgb": [
        0,
        0,
        255
      ]
    },
    {
      "name": "Sienna",
      "hex": "#A9561E",
      "rgb": [
        169,
        86,
        30
      ]
    }
  ],
  "harmony": "Split-Complementary",
  "contrastRatio": 1.65
}

Do blue and sienna go together?

Yes. Blue and Sienna form a split-complementary color combination. This is a split-complementary pairing: one color paired with the two neighbors of its complement. It offers most of the contrast of a complementary scheme with less tension, making it easier to balance. The pairing has a WCAG contrast ratio of 1.65:1, 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 sienna?

The WCAG 2.1 contrast ratio between Blue (#0000FF) and Sienna (#A9561E) is 1.65:1. 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 sienna 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 sienna?

Blue has the hex code #0000FF and RGB values rgb(0, 0, 255). Sienna has the hex code #A9561E and RGB values rgb(169, 86, 30). You can copy these directly into CSS or use the design tokens provided on this page.