The color for frame labels was a mix of the text color (black by default) and the node theme color with a factor of 0.8, which coincidentally is the same as the node body color. Changed it to 0.4, which is the same as the regular node labels use.
The color for frame labels was a mix of the text color (black by default) and the node theme color with a factor of 0.8, which coincidentally is the same as the node body color. Changed it to 0.4, which is the same as the regular node labels use.