| 21. | On artificial surfaces, the field of play should be coloured green, ultramarine blue or signal blue.
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| 22. | In 1834, Leverkus opened the first German factory for the production of artificial ultramarine blue in Wermelskirchen.
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| 23. | Top row shows his usual colors : titanium white, yellow ochre, ultramarine blue and cadmium red light.
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| 24. | In the center is a ultramarine blue stripe, flanked by stripes of golden yellow and white, spaced apart.
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| 25. | The " curtain " had piping for enlisted men in the USAAF branch colors of orange and ultramarine blue.
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| 26. | Topchy credits Klein's use of a saturated ultramarine blue pigment that represented " the void " as a pivotal discovery.
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| 27. | In August 2003, the tower was painted an ultramarine blue to cover the existing light brown which had started to discolour.
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| 28. | These included cobalt blue, viridian, cadmium yellow, and synthetic ultramarine blue, all of which were in use by the 1840s, before Impressionism.
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| 29. | The flag has the proportions 1 : 2, with the provincial shield of arms in the centre of an ultramarine blue background.
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| 30. | Hockney uses a limited palette cobalt blue, ultramarine blue, collaging many photographs of the same subject taken over a period of hours.
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