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COLORBOND® steel in the colour Basalt®. Grey basalt rocks.

Basalt Classic finish

Colour Values

CMYK51 43 40 32
RGB109 108 110

Nominal Thermal Values

Solar Absorptance0.67
Solar Reflectance Index35

These solar absorptance values are nominal values based on new product. Solar absorptance has been measured in accordance with ASTM E 903-96, ‘Standard test method for solar absorptance, reflectance and transmittance of materials using integrating spheres’. Solar absorptance is a thermal property and is not suitable for evaluation of visual impacts. Thermal values published 23/8/2022. For further information refer to BlueScope Technical Bulletin TB 39 Thermal performance of roofing materials.

Enduring strength

Inspired by the mineral tones of the ancient rock it represents, COLORBOND® steel in the colour Basalt® is a deep, cool grey that recalls solidity and strength. COLORBOND® steel Basalt® coordinates seamlessly with many popular building materials such as greyed timbers, recycled brick and concrete. A robust choice, use COLORBOND® steel in the colour Basalt® as roofing, walling, gutters and fascia applications to create a strong base and solid form that anchors into lush landscaping.

Available in


The colours shown represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing, as varying screens and devices may affect colour tones and finishes.