I don't think you can unless it was pink to begin with an then turned white. In that case you can try making the soil more acidic.
A typical dogwood blossom has four large petals that are usually white or pink in color.
Virginia's state flower is the dogwood, a small white blossom that grows on the dogwood tree.
white
The blossom of an orange tree is white. See the link to the image below.
White, pink, or red.
The primary color of a dogwood tree is white, but there are also pink and red ones.
The Dogwood blooms a creamy white color.
An Orange Blossom's petals are white with long white pistils and yellow stigmas.
Dogwood trees, but there is a rare dogwood in the cooler regions that have a pink bloom.
Dogwood trees can be identified by their opposite branching pattern, oval-shaped leaves with visible veins, and clusters of small white or pink flowers in the spring. Additionally, the bark of mature dogwood trees is typically scaly or blocky in texture and gray to brown in color.
Your cherry blossom tree may change color from pink to white due to a variety of factors, including the specific variety of the tree, environmental conditions, or health issues. Some cherry blossom varieties naturally transition to a lighter shade as they mature. Additionally, stress from factors like temperature fluctuations or disease can affect flower pigmentation. It's also possible that the tree is experiencing a natural cycle influenced by its growing conditions.
it is pink,or sometimes a mix of purple and pink.. it is very beautiful