My 214 character solution
<style>html{background-size:250px 250px;background-image:linear-gradient(to right,#62374e 50px,transparent 0 100px,#62374e 100px),linear-gradient(to bottom,#62374e 50px,#fdc57b 0 100px,#62374e 0 200px,#fdc57b 50px)
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My 214 character solution