SVG Backgroundsは、SVGで作成された背景のCSSコードが紹介されているWEBサービスです。
プレビューを表示するとCSSのコードが出力されるので、コピーしてそのまま利用することができます。
SVG Backgroundsの使い方
SVG Backgroundsにアクセスして、使いたい背景を選びます。「CSS Output」にコードが出力されるので、コピーして利用します。
背景をカスタマイズしたい場合は、「Customize」で調整しましょう。
実際に出力されるコードは、以下のようになっています。background-imageの値がめちゃめちゃ長いですが、CSSにコピペするとプレビューと同じ背景を実装できます。
background-color: #ffdd99;
background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100%25'%3E%3Cdefs%3E%3ClinearGradient id='a' gradientUnits='userSpaceOnUse' x1='0' x2='0' y1='0' y2='100%25' gradientTransform='rotate(240)'%3E%3Cstop offset='0' stop-color='%23FD9'/%3E%3Cstop offset='1' stop-color='%234FE'/%3E%3C/linearGradient%3E%3Cpattern patternUnits='userSpaceOnUse' id='b' width='540' height='450' x='0' y='0' viewBox='0 0 1080 900'%3E%3Cg fill-opacity='0.1'%3E%3Cpolygon fill='%23444' points='90%2C150 0%2C300 180%2C300'/%3E%3Cpolygon points='90%2C150 180%2C0 0%2C0'/%3E%3Cpolygon fill='%23AAA' points='270%2C150 360%2C0 180%2C0'/%3E%3Cpolygon fill='%23DDD' points='450%2C150 360%2C300 540%2C300'/%3E%3Cpolygon fill='%23999' points='450%2C150 540%2C0 360%2C0'/%3E%3Cpolygon points='630%2C150 540%2C300 720%2C300'/%3E%3Cpolygon fill='%23DDD' points='630%2C150 720%2C0 540%2C0'/%3E%3Cpolygon fill='%23444' points='810%2C150 720%2C300 900%2C300'/%3E%3Cpolygon fill='%23FFF' points='810%2C150 900%2C0 720%2C0'/%3E%3Cpolygon fill='%23DDD' points='990%2C150 900%2C300 1080%2C300'/%3E%3Cpolygon fill='%23444' points='990%2C150 1080%2C0 900%2C0'/%3E%3Cpolygon fill='%23DDD' points='90%2C450 0%2C600 180%2C600'/%3E%3Cpolygon points='90%2C450 180%2C300 0%2C300'/%3E%3Cpolygon fill='%23666' points='270%2C450 180%2C600 360%2C600'/%3E%3Cpolygon fill='%23AAA' points='270%2C450 360%2C300 180%2C300'/%3E%3Cpolygon fill='%23DDD' points='450%2C450 360%2C600 540%2C600'/%3E%3Cpolygon fill='%23999' points='450%2C450 540%2C300 360%2C300'/%3E%3Cpolygon fill='%23999' points='630%2C450 540%2C600 720%2C600'/%3E%3Cpolygon fill='%23FFF' points='630%2C450 720%2C300 540%2C300'/%3E%3Cpolygon points='810%2C450 720%2C600 900%2C600'/%3E%3Cpolygon fill='%23DDD' points='810%2C450 900%2C300 720%2C300'/%3E%3Cpolygon fill='%23AAA' points='990%2C450 900%2C600 1080%2C600'/%3E%3Cpolygon fill='%23444' points='990%2C450 1080%2C300 900%2C300'/%3E%3Cpolygon fill='%23222' points='90%2C750 0%2C900 180%2C900'/%3E%3Cpolygon points='270%2C750 180%2C900 360%2C900'/%3E%3Cpolygon fill='%23DDD' points='270%2C750 360%2C600 180%2C600'/%3E%3Cpolygon points='450%2C750 540%2C600 360%2C600'/%3E%3Cpolygon points='630%2C750 540%2C900 720%2C900'/%3E%3Cpolygon fill='%23444' points='630%2C750 720%2C600 540%2C600'/%3E%3Cpolygon fill='%23AAA' points='810%2C750 720%2C900 900%2C900'/%3E%3Cpolygon fill='%23666' points='810%2C750 900%2C600 720%2C600'/%3E%3Cpolygon fill='%23999' points='990%2C750 900%2C900 1080%2C900'/%3E%3Cpolygon fill='%23999' points='180%2C0 90%2C150 270%2C150'/%3E%3Cpolygon fill='%23444' points='360%2C0 270%2C150 450%2C150'/%3E%3Cpolygon fill='%23FFF' points='540%2C0 450%2C150 630%2C150'/%3E%3Cpolygon points='900%2C0 810%2C150 990%2C150'/%3E%3Cpolygon fill='%23222' points='0%2C300 -90%2C450 90%2C450'/%3E%3Cpolygon fill='%23FFF' points='0%2C300 90%2C150 -90%2C150'/%3E%3Cpolygon fill='%23FFF' points='180%2C300 90%2C450 270%2C450'/%3E%3Cpolygon fill='%23666' points='180%2C300 270%2C150 90%2C150'/%3E%3Cpolygon fill='%23222' points='360%2C300 270%2C450 450%2C450'/%3E%3Cpolygon fill='%23FFF' points='360%2C300 450%2C150 270%2C150'/%3E%3Cpolygon fill='%23444' points='540%2C300 450%2C450 630%2C450'/%3E%3Cpolygon fill='%23222' points='540%2C300 630%2C150 450%2C150'/%3E%3Cpolygon fill='%23AAA' points='720%2C300 630%2C450 810%2C450'/%3E%3Cpolygon fill='%23666' points='720%2C300 810%2C150 630%2C150'/%3E%3Cpolygon fill='%23FFF' points='900%2C300 810%2C450 990%2C450'/%3E%3Cpolygon fill='%23999' points='900%2C300 990%2C150 810%2C150'/%3E%3Cpolygon points='0%2C600 -90%2C750 90%2C750'/%3E%3Cpolygon fill='%23666' points='0%2C600 90%2C450 -90%2C450'/%3E%3Cpolygon fill='%23AAA' points='180%2C600 90%2C750 270%2C750'/%3E%3Cpolygon fill='%23444' points='180%2C600 270%2C450 90%2C450'/%3E%3Cpolygon fill='%23444' points='360%2C600 270%2C750 450%2C750'/%3E%3Cpolygon fill='%23999' points='360%2C600 450%2C450 270%2C450'/%3E%3Cpolygon fill='%23666' points='540%2C600 630%2C450 450%2C450'/%3E%3Cpolygon fill='%23222' points='720%2C600 630%2C750 810%2C750'/%3E%3Cpolygon fill='%23FFF' points='900%2C600 810%2C750 990%2C750'/%3E%3Cpolygon fill='%23222' points='900%2C600 990%2C450 810%2C450'/%3E%3Cpolygon fill='%23DDD' points='0%2C900 90%2C750 -90%2C750'/%3E%3Cpolygon fill='%23444' points='180%2C900 270%2C750 90%2C750'/%3E%3Cpolygon fill='%23FFF' points='360%2C900 450%2C750 270%2C750'/%3E%3Cpolygon fill='%23AAA' points='540%2C900 630%2C750 450%2C750'/%3E%3Cpolygon fill='%23FFF' points='720%2C900 810%2C750 630%2C750'/%3E%3Cpolygon fill='%23222' points='900%2C900 990%2C750 810%2C750'/%3E%3Cpolygon fill='%23222' points='1080%2C300 990%2C450 1170%2C450'/%3E%3Cpolygon fill='%23FFF' points='1080%2C300 1170%2C150 990%2C150'/%3E%3Cpolygon points='1080%2C600 990%2C750 1170%2C750'/%3E%3Cpolygon fill='%23666' points='1080%2C600 1170%2C450 990%2C450'/%3E%3Cpolygon fill='%23DDD' points='1080%2C900 1170%2C750 990%2C750'/%3E%3C/g%3E%3C/pattern%3E%3C/defs%3E%3Crect x='0' y='0' fill='url(%23a)' width='100%25' height='100%25'/%3E%3Crect x='0' y='0' fill='url(%23b)' width='100%25' height='100%25'/%3E%3C/svg%3E");
background-attachment: fixed;
background-size: cover;
background-position: center;
あとがき
SVGは拡大・縮小が自在にできるため、レスポンシブ対応のサイトやアニメーションさせたい場合に相性が良いです。
一風変わった背景を実装したい時は、ぜひご活用ください。