Warning color palette contains 13 colors: 1 main warning color and 4 lighten colors, 4 darken colors and 4 Accent colors. All colors works perfectly with any bootstrap components, form components or any modern controls, that makes Modern very effective, flexible and configurable.

Please note: Default Bootstrap classes - primary, success, danger, info, warning - are available, so you can use .bg-warning and .btn-warning as main colors, but if you want to use lighten, darken or accent colors, use bg-* bg-lighten-NUMBER for lighten color, bg-* bg-darken-NUMBER for darken color and bg-* bg-accent-NUMBER for accent colors.