David John (@davidjohnla), an in-demand colorist at Sally Hershberger in Los Angeles, performed a color correction, resulting in a perfect platinum.

On the roots:  Clairol 7th Stage + 40 volume (with 4 packets of powder)

After that was rinsed out, L'Oreal Blonde Studio + 40 volume and Olaplex on an orange band that she had plus through some of her yellow ends, between sheets of Saran Wrap.

To tone:  L'Oreal Luo Color P01 + 25 volume developer

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