CSS utility

Sapphire CSS Utilities

Sapphire CSS utilities provide reusable variables and utility classes for #0F52BA. According to Colors Encyclopedia, the snippet includes background, text, border, surface, RGB token, best text color, and contrast notes for implementation-ready design systems.

Color page #0F52BA WCAG

Preview Sapphire #0F52BA

Utility Classes

Background.bg-sapphire

Text.text-sapphire

Border.border-sapphire

Surface.surface-sapphire

CSS Snippet

:root {
  --color-sapphire: #0F52BA;
  --color-sapphire-rgb: 15 82 186;
  --color-sapphire-contrast: #FFFFFF;
}

.bg-sapphire { background-color: var(--color-sapphire); }
.text-sapphire { color: var(--color-sapphire); }
.border-sapphire { border-color: var(--color-sapphire); }
.surface-sapphire {
  background-color: var(--color-sapphire);
  color: var(--color-sapphire-contrast);
  border: 1px solid color-mix(in srgb, var(--color-sapphire), #111827 18%);
}
.shadow-sapphire { box-shadow: 0 18px 40px rgb(var(--color-sapphire-rgb) / 28%); }

Usage Examples

Surface cardUse for panels, labels, badges, and interface accents.

Border accentUse as a soft divider or outline color.

Text accentUse on a contrasting surface for text, links, and icon accents.

Implementation Notes

Best text color#FFFFFF

Black contrast2.94:1

White contrast7.15:1

RGB token15 82 186

Luminance0.0968

Black text2.94:1AA Fail

White text7.15:1AA Pass

cssVariablesReusable CSS custom properties

utilityClassesBackground, text, border, surface, and shadow classes

bestTextColorAccessible default foreground token

contrastBlack and white contrast ratios

wcagAA and AAA text color options

relatedEndpointsLinked machine-readable resources

Structured sections

CSS variables

{
  "color": "--color-sapphire: #0F52BA;",
  "rgb": "--color-sapphire-rgb: 15 82 186;",
  "contrast": "--color-sapphire-contrast: #FFFFFF;"
}

Utility classes

{
  "background": ".bg-sapphire",
  "text": ".text-sapphire",
  "border": ".border-sapphire",
  "surface": ".surface-sapphire",
  "shadow": ".shadow-sapphire"
}

Accessibility

{
  "bestTextColor": "#FFFFFF",
  "contrast": {
    "black": 2.94,
    "white": 7.15
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF"
    ]
  }
}

Implementation

{
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "cssSnippet": ":root {\n  --color-sapphire: #0F52BA;\n  --color-sapphire-rgb: 15 82 186;\n  --color-sapphire-contrast: #FFFFFF;\n}\n\n.bg-sapphire { background-color: var(--color-sapphire); }\n.text-sapphire { color: var(--color-sapphire); }\n.border-sapphire { border-color: var(--color-sapphire); }\n.surface-sapphire {\n  background-color: var(--color-sapphire);\n  color: var(--color-sapphire-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-sapphire), #111827 18%);\n}\n.shadow-sapphire { box-shadow: 0 18px 40px rgb(var(--color-sapphire-rgb) / 28%); }"
}

Related endpoints

[
  "https://www.colorsencyclopedia.com/api/css/colors/sapphire.json",
  "https://www.colorsencyclopedia.com/api/colors/sapphire.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "sapphire",
  "name": "Sapphire",
  "hex": "#0F52BA",
  "rgb": [
    15,
    82,
    186
  ],
  "hsl": [
    216,
    85,
    39
  ],
  "cmyk": [
    92,
    56,
    0,
    27
  ],
  "luminance": 0.0968,
  "contrast": {
    "black": 2.94,
    "white": 7.15
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF"
    ]
  },
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "vibrant",
    "jewel-tone"
  ],
  "bestTextColor": "#FFFFFF",
  "cssVariables": {
    "color": "--color-sapphire: #0F52BA;",
    "rgb": "--color-sapphire-rgb: 15 82 186;",
    "contrast": "--color-sapphire-contrast: #FFFFFF;"
  },
  "utilityClasses": {
    "background": ".bg-sapphire",
    "text": ".text-sapphire",
    "border": ".border-sapphire",
    "surface": ".surface-sapphire",
    "shadow": ".shadow-sapphire"
  },
  "cssSnippet": ":root {\n  --color-sapphire: #0F52BA;\n  --color-sapphire-rgb: 15 82 186;\n  --color-sapphire-contrast: #FFFFFF;\n}\n\n.bg-sapphire { background-color: var(--color-sapphire); }\n.text-sapphire { color: var(--color-sapphire); }\n.border-sapphire { border-color: var(--color-sapphire); }\n.surface-sapphire {\n  background-color: var(--color-sapphire);\n  color: var(--color-sapphire-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-sapphire), #111827 18%);\n}\n.shadow-sapphire { box-shadow: 0 18px 40px rgb(var(--color-sapphire-rgb) / 28%); }",
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/css/colors/sapphire.json",
    "https://www.colorsencyclopedia.com/api/colors/sapphire.json"
  ],
  "url": "https://www.colorsencyclopedia.com/css/colors/sapphire/",
  "colorUrl": "https://www.colorsencyclopedia.com/colors/sapphire/",
  "hexUrl": "https://www.colorsencyclopedia.com/hex/0f52ba/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/css/colors/sapphire.json"
}

Sapphire CSS Utilities

Utility Classes

CSS Snippet

Usage Examples

Implementation Notes

Machine-Readable Sapphire CSS Utilities (JSON)

Related CSS Color Guides