| COBALT | Meaning "goblin", metallic element from which a blue pigment derives (6) |
| COPPER | Metallic element from which azurite, turquoise, etc derive their blue-greenish colours (6) |
| CARBON | Element from which diamonds are formed (6) |
| MARINE | Word linking with "ultra" for a blue pigment traditionally derived from lapis lazuli that was used in the Wilton Diptych (6) |
| HELIUM | A gaseous element from the first hundred mile reformation |
| SILVER | Element from fossil verbenas (6) |
| DIGRAM | Sequence of two adjacent elements from a string of tokens, which are typically letters, syllables, or words, often used in analysis |
| RADIUM | Chemical element from commercial one put in alcoholic drink |
| MATRIX | Rectangular layout of elements from report of month with pranks? |
| INDIGO | Very dark blue pigment (6) |
| RIDDLE | Remove coarser elements from puzzle |
| ZAFFER | Blue pigment |
| CYAN | A blue pigment used as a primary colour in printing (4) |
| RAREEARTH | Metallic element from old show for old king shedding old city (4,5) |
| CERULEAN | Luceme put out about a blue pigment (8) |
| LITHIUM | Lightest of the known metallic elements; from Greek, ' stone' (7) |
| ELECTROMAGNETS | Metallic elements from Egremont Castle (14) |
| ANGORACAT | Feline in which a blue eye indicates deafness |
| ETHER | From Greek for "upper air", the fifth classical element from whose name a word for airy, celestial, gossamer, heavenly or spiritual derives (5) |
| SILVERWEDDING | Element from Union celebrates vows made a quarter of century ago (6,7) |
