:root {
    --color-1: #121212; /* charcoal black */
    --color-2: #e0e0e0; /* light gray */
    --color-3: #b0b0b0; /* medium grey */
    --color-4: #444444; /* dark gray */
    --color-5: #888888; /* soft gray */
    --color-6: #1E90FF; /* electric blue */
}