A pressure sensitive adhesive sheet having a pressure sensitive adhesive layer that includes at least one colored pressure sensitive adhesive layer, the colored pressure sensitive adhesive layer having a pressure sensitive adhesive that contains a colorant, the pressure sensitive adhesive layer having a lightness L* of 90 or less as defined by a CIE 1976 L*a*b* color system, the pressure sensitive adhesive layer having a total luminous transmittance of 3% or more and a thermal conductivity of 0.1 W/m·K or more.