CSL308801: Avoid unwanted box model sizing issues in CSS
CSL308802: Avoid properties that don't work based with the display property being used in CSS
CSL308803: Avoid duplicate properties in CSS
CSL308804: Avoid un anchored hovers in CSS
CSL308805: Avoid empty rules in CSS
CSL308806: Use only known properties in CSS
CSL308807: Avoid adjoining classes in CSS
CSL308808: Avoid property box-sizing in CSS
CSL308809: Use compatible vendor prefixes in CSS
CSL308810: Use all gradient definitions in CSS
CSL308811: Avoid negative text indent in CSS
CSL308812: Use standard property with vendor prefix in CSS
CSL308813: Use fallback colors in CSS
CSL308814: Avoid star hack in CSS
CSL308815: Avoid underscore hack in CSS
CSL308816: Use bulletproof font face in CSS
CSL308817: Do not use too many web fonts in CSS
CSL308818: Do not use @import in CSS
CSL308819: Avoid selectors that look like regular expressions in CSS
CSL308820: Do not use universal selector in CSS
CSL308821: Do not use unqualified attribute selectors in CSS
CSL308822: Do not use units for zero values in CSS
CSL308823: Avoid overqualified elements in CSS
CSL308824: Use shorthand properties in CSS
CSL308825: Do not use duplicate background images in CSS
CSL308826: Avoid too many floats in CSS
CSL308827: Do not use too many font size declarations in CSS
CSL308828: Do not use IDs in selectors in CSS
CSL308829: Do not use !important in CSS
CSL308830: Do not use outline:none in CSS
CSL308831: Do not use qualified headings in CSS
CSL308832: Define headings only once in CSS

CSL308813: Use fallback colors in CSS

This rule is aimed at ensuring a proper color is displayed for all browsers. As such, the rule warns when it finds a color property with a rgba(), hsl(), or hsla() color without a preceding color property that has an older color format, a background property with a rgba(), hsl(), or hsla() color without a preceding background property that has an older color format or a background-color property with a rgba(), hsl(), or hsla() color without a preceding background-color property that has an older color format.

TypeName: UseFallbackColorsInCSS
CheckId: CSL308813
Severity: Warning
Type: CSSFile
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