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Red and SeaGreen

Split-Complementary color combination with 1.06:1 contrast ratio

#FF0000
#2E8B57

Color Values

Red
HEX #FF0000
RGB 255, 0, 0
HSL 0, 100%, 50%
SeaGreen
HEX #2E8B57
RGB 46, 139, 87
HSL 146, 50%, 36%

Harmony: Split-Complementary

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 hue angle between Red and SeaGreen is 146 degrees. You can explore these relationships interactively in our Color Wheel Tool.

WCAG Contrast

1.06:1
Red background with SeaGreen text
Below AA — decorative use only

UI Preview

Red surface

Sample text on a red background demonstrates readability and visual hierarchy.

SeaGreen surface

Sample text on a seagreen background demonstrates readability and visual hierarchy.

Design Tokens

CSS Variables

:root {
  --color-a: #FF0000;
  --color-b: #2E8B57;
  --color-a-rgb: 255, 0, 0;
  --color-b-rgb: 46, 139, 87;
}

JSON

{
  "name": "Red and SeaGreen",
  "colors": [
    {
      "name": "Red",
      "hex": "#FF0000",
      "rgb": [
        255,
        0,
        0
      ]
    },
    {
      "name": "SeaGreen",
      "hex": "#2E8B57",
      "rgb": [
        46,
        139,
        87
      ]
    }
  ],
  "harmony": "Split-Complementary",
  "contrastRatio": 1.06
}

Explore These Colors

Frequently Asked Questions

Do red and seagreen go together?

Yes. Red and SeaGreen 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 1.06:1, which is below the AA threshold for text — use it for decorative purposes rather than text readability.

What is the contrast ratio between red and seagreen?

The WCAG 2.1 contrast ratio between Red (#FF0000) and SeaGreen (#2E8B57) is 1.06:1. This ratio is below AA. Use the pairing for backgrounds, borders, and decorative elements rather than text-on-background combinations.

How do I use red and seagreen 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 seagreen?

Red has the hex code #FF0000 and RGB values rgb(255, 0, 0). SeaGreen has the hex code #2E8B57 and RGB values rgb(46, 139, 87). You can copy these directly into CSS or use the design tokens provided on this page.