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div { display: inline-block; border: 1px solid silver; padding: 5px;
line-height: 2em; writing-mode: sideways-lr; }
span { padding: 5px; color: transparent; }
span:nth-child(1) { background: red; }
span:nth-child(2) { background: orange; }
span:nth-child(3) { background: yellow; }
span:nth-child(4) { background: green; }
span:nth-child(5) { background: blue; }
span:nth-child(6) { background: indigo; }
span:nth-child(7) { background: violet; }
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<div><span>"One two
<span>three</span> <span>four</span> <span>five</span>
<span>six</span> <span>seven."
<
div dir=rtl><
span>
"One two
<
span>three</
span> <
span>four</
span> <
span>five</
span>
<
span>six</
span> <
span>seven.
"
