31/31 Не работает проверка!

Подскажите, пожалуйста, что не так?

.palette-small {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-content: center;
}
.palette-box:first-child .palette-small {
flex-direction: column-reverse;
align-items: center;
}
.palette-box:first-child .color-2, .color-5 {
align-self: stretch;
}
.palette-box:first-child .color-4 {
order: -1;
}
.palette-box:first-child .color-3{
order: 3;
}
.palette-box:nth-child(2) .palette-small{
flex-direction: column-reverse;
align-items: center;
justify-content: space-between;
}
.palette-box:nth-child(2) .color-4, .color-1 {
align-self: flex-start;
}
.palette-box:nth-child(2) .color-2, .color-6 {
align-self: flex-end;
}
.palette-box:nth-child(3) .palette-small {
flex-direction: row;
justify-content: space-between;
}
.palette-box .part {
display: flex;
justify-content: space-between;
}
.palette-box:nth-child(3) .part {
flex-direction: column;
justify-content: space-between;
}
.palette-box:nth-child(4) .part:nth-child(2) {
flex-direction: column;
}
.palette-box:nth-child(4) .palette-small {
justify-content: space-between;
}

.palette-small {
display: flex;
flex-direction: row;
/flex-wrap: wrap;/
justify-content: center;
align-content: center;
}

спасибо!