Redken Shades EQ is a professional, acidic demi-permanent hair color. It is known for its ability to condition and add incredible shine while depositing tone. Shades EQ is ideal for refreshing color, toning highlights, glazing, and achieving vibrant fashion shades. Its formula is ammonia-free, ensuring a more gentle coloring experience. This particular shade, 09B (often referred to as 'Cool Pearl' or similar), is designed to neutralize unwanted yellow tones and create a cool, pearlescent blonde result. It works effectively on pre-lightened hair to achieve specific tonal outcomes without lifting the natural base color.