Color Contrast Insufficient with Error Text

There is a problem with color contrast in the

The background hsla(15, 75%, 97%, 1) is very close to #FCF4F2, but the latter is used in:
core/modules/system/css/system.theme.css: background-color: #fcf4f2;
core/themes/seven/style.css: background-color: #fcf4f2;

This lighter red #e62600 is just used in a few places in core/themes/seven/style.css

.form-item input.error, .form-item textarea.error, .form-item select.error {
    background-color: hsla(15, 75%, 97%, 1);
    border-color: #e62600;
    border-width: 2px;
    box-shadow: 0 5px 5px -5px #b8b8b8 inset;
    color: #e62600;
}

This gives us a 4.2 Color Contrast according to http://leaverou.github.io/contrast-ratio/#%23e62600-on-hsla%2815%2C75%25...

In other places in core/modules/system/css/system.theme.css we use the darker color #a51b00 which has sufficient contrast against the light pink.

#a51b00 is more consistent, but might be too dark, but #e62600 is too light.