What color is the background of warning signs in Sweden?

The background of warning signs in Sweden is yellow.

Swedish warning signs generally have a red border, a yellow field, and a black symbol. This combination distinguishes warnings from other sign groups, such as blue information signs and yellow-and-red priority signs. The strong contrast helps signs remain visible in Sweden’s varied daylight and winter conditions.

Many European countries use white backgrounds for warning signs, which is why Swedish signs can surprise visitors. Finland and Iceland also use yellow warning-sign backgrounds, creating a regional pattern in parts of northern Europe, although national details still differ.

Sweden’s road signs follow the broad European system influenced by international agreements, while retaining national design choices. A warning sign alerts road users to a hazard ahead; it does not itself impose the same kind of direct instruction as a stop or speed-limit sign.