The 18-year-old reality star headed out to dinner with Caitlyn Jenner on Monday evening wearing a bold shade of blue lipstick, and for the best reason...
To help put a stop to bullying.
"Wearing blue lips today in honor of world bullying prevention," she captioned the photo.
"#BlueShirtDay2015 #WorldBullyingPreventionDay wear blue and post a pic with the hashtags! Spread love & you will receive. Nothing can be done if we don't do it together!"
Last month Jenner famously started the #IAmMoreThan Instagram campaign, where she shared stories of six "incredible people who have become heroes in their own way by taking bullying and turning it into something positive."