From 1934 until quite recently, the Christian Reformed Church in North America worshipped with a succession of Psalter Hymnals, the most recent of which was published in 1989 and sported a grey cover. This volume sat in the pews of congregations until the grand shift to overhead slides with words, and in some cases music, projected onto screens, enabling parishioners to sing without books in their hands, as well as to sing songs not contained in the books.
Our own congregation replaced the grey Psalter Hymnals some years ago with a collection jointly produced by the CRC and the Reformed Church in America (RCA), called, Lift Up Your Hearts: Psalms, Hymns, and Spiritual Songs (LUYH). We read this on the hymnal's website: