Shiva Purana

siva.sh/siva-purana/saturda-samhita/1/12

ततो विंशतिमः कल्पो रक्तो नाम प्रकीर्तितः ।। ब्रह्मा यत्र महातेजा रक्तवर्णमधारयत् ।।१२।।

sanskrit

The next Kalpa, the twentieth one is named and glorified as Rakta (red) wherein Brahmā assumed a great splendour red in hue.

english translation

tato viMzatimaH kalpo rakto nAma prakIrtitaH || brahmA yatra mahAtejA raktavarNamadhArayat ||12||

hk transliteration by Sanscript