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SkyBlue and SlateGray

Analogous color combination with 2.33:1 contrast ratio

#87CEEB
#708090

Color Values

SkyBlue
HEX #87CEEB
RGB 135, 206, 235
HSL 197, 71%, 73%
SlateGray
HEX #708090
RGB 112, 128, 144
HSL 210, 13%, 50%

Harmony: Analogous

These colors sit beside each other on the wheel, so the pairing feels calm and cohesive. Analogous schemes are easy on the eye and work well for gradients, backgrounds, and designs that want to feel settled rather than energetic.

The hue angle between SkyBlue and SlateGray is 13 degrees. You can explore these relationships interactively in our Color Wheel Tool.

WCAG Contrast

2.33:1
SkyBlue background with SlateGray text
Below AA — decorative use only

UI Preview

SkyBlue surface

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

SlateGray surface

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

Design Tokens

CSS Variables

:root {
  --color-a: #87CEEB;
  --color-b: #708090;
  --color-a-rgb: 135, 206, 235;
  --color-b-rgb: 112, 128, 144;
}

JSON

{
  "name": "SkyBlue and SlateGray",
  "colors": [
    {
      "name": "SkyBlue",
      "hex": "#87CEEB",
      "rgb": [
        135,
        206,
        235
      ]
    },
    {
      "name": "SlateGray",
      "hex": "#708090",
      "rgb": [
        112,
        128,
        144
      ]
    }
  ],
  "harmony": "Analogous",
  "contrastRatio": 2.33
}

Explore These Colors

Frequently Asked Questions

Do skyblue and slategray go together?

Yes. SkyBlue and SlateGray form a analogous color combination. These colors sit beside each other on the wheel, so the pairing feels calm and cohesive. Analogous schemes are easy on the eye and work well for gradients, backgrounds, and designs that want to feel settled rather than energetic. The pairing has a WCAG contrast ratio of 2.33:1, which is below the AA threshold for text — use it for decorative purposes rather than text readability.

What is the contrast ratio between skyblue and slategray?

The WCAG 2.1 contrast ratio between SkyBlue (#87CEEB) and SlateGray (#708090) is 2.33:1. This ratio is below AA. Use the pairing for backgrounds, borders, and decorative elements rather than text-on-background combinations.

How do I use skyblue and slategray 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. Because analogous colors blend naturally, you can use them in more equal proportions without visual conflict. Test the result with our Contrast Checker if text is involved.

What are the hex and RGB values for skyblue and slategray?

SkyBlue has the hex code #87CEEB and RGB values rgb(135, 206, 235). SlateGray has the hex code #708090 and RGB values rgb(112, 128, 144). You can copy these directly into CSS or use the design tokens provided on this page.