Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
व्याध्यग्निचौरशस्त्रास्त्रभयदः प्राणिनां भवेत् ।अनावृष्टिं भूम्रनिभः करोति सुरपूजितः ॥ ५८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 58.
These colours bring living beings fear of illness, fire, thieves, weapons and missiles, in that order. Jupiter looking smoke-coloured causes no rain.
Simple meaning: Jupiter's colour shows the fear to come: illness, fire, thieves or weapons. A smoky Jupiter brings drought.
Classical view, not medical advice.
दिवादृष्टो नृपवध्यामयंवाराष्ट्रनाशनम् ।
Seen in daylight, it can bring danger to a king, illness and harm to the land.
नाभिस्त्वापाठ्युगलमाद्री हृत्कुसुमं मघा ।
When a cruel planet strikes the year's body, famine, fire and wind can be feared.
नाभ्यां क्षुत्तृड्भयं पुष्ये सम्यङ्मूलफलक्षयः ।
Strikes on the year's navel, flower or heart risk hunger, fruit loss or a ruler's life. Good planets help.