Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:2:69

They said, "Call upon your Lord to show us what is her color." He said, "He says, 'It is a yellow cow, bright in color - pleasing to the observers.' "  

They said, ‘Pray to your Lord for us, that He make clear to us what her colour may be’ He said, ‘He says she shall be a golden cow, bright in colour, that is, of a very intense yellow, gladdening to beholders: its beauty will please those that look at it.
القرآن:٢:٦٩

قَالُوا ادْعُ لَنَا رَبَّكَ يُبَيِّنْ لَنَا مَا لَوْنُهَا ۚ قَالَ إِنَّهُ يَقُولُ إِنَّهَا بَقَرَةٌ صَفْرَاءُ فَاقِعٌ لَوْنُهَا تَسُرُّ النَّاظِرِينَ  

{قالوا ادع لنا ربك يبين لنا ما لونها قال إنه يقول إنها بقرة صفراء فاقع لونها} شديد الصفرة، {تسر الناظرين} إليها بحسنها أي تعجبهم.