css hover class change another code example

Example 1: how to change another element on hover

// If the cube is directly inside the container:
#container:hover > #cube { background-color: yellow; }

// If cube is next to (after containers closing tag) the container:
#container:hover + #cube { background-color: yellow; }

// If the cube is somewhere inside the container:
#container:hover #cube { background-color: yellow; }

// If the cube is a sibling of the container:
#container:hover ~ #cube { background-color: yellow; }

Example 2: css hover change other element

#container:hover > #cube { background-color: yellow; }

Example 3: on class hover another class color change

/* For wrapper is a child of item */
.item:hover .wrapper {
    color: #fff;
    background-color: #000;
}

/* For wrapper is another div and item is another */
.item:hover ~ .wrapper {
    color: #fff;
    background-color: #000;
}