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miken32
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.triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */ background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* IE10+ */ background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* W3C */; } 

.triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */ background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* IE10+ */ background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* W3C */; }
<div class="triangle"></div>

.triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */ background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* IE10+ */ background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* W3C */; } 

.triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */ background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* IE10+ */ background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* W3C */; }
<div class="triangle"></div>

added 68 characters in body
Source Link
Josh Crozier
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Different approach. With linear gradient (for IE, only IE 10+). You can use any angle:

 .triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */  background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%);   /* FF3.6+ */  background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1)));   /* Chrome,Safari4+ */  background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* Chrome10+,Safari5.1+ */  background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* Opera 11.10+ */  background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* IE10+ */  background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* W3C */; } 

Here is jsfiddle

Different approach. With linear gradient (for IE, only IE 10+). You can use any angle:

 .triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */ background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* IE10+ */ background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* W3C */ } 

Here is jsfiddle

Different approach. With linear gradient (for IE, only IE 10+). You can use any angle:

.triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */  background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%);   /* FF3.6+ */  background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1)));   /* Chrome,Safari4+ */  background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* Chrome10+,Safari5.1+ */  background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* Opera 11.10+ */  background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* IE10+ */  background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%);   /* W3C */; } 

Here is jsfiddle

Source Link
lima_fil
  • 1.8k
  • 1
  • 28
  • 34

Different approach. With linear gradient (for IE, only IE 10+). You can use any angle:

 .triangle { margin: 50px auto; width: 100px; height: 100px; /* linear gradient */ background: -moz-linear-gradient(-45deg, rgba(255,0,0,0) 0%, rgba(255,0,0,0) 50%, rgba(255,0,0,1) 50%, rgba(255,0,0,1) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, right bottom, color-stop(0%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,0)), color-stop(50%,rgba(255,0,0,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(-45deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* IE10+ */ background: linear-gradient(135deg, rgba(255,0,0,0) 0%,rgba(255,0,0,0) 50%,rgba(255,0,0,1) 50%,rgba(255,0,0,1) 100%); /* W3C */ } 

Here is jsfiddle