1. Green: Green is often used to represent vegetation and forests. You can use green to show the lush forests of East Texas, especially the Piney Woods region, or the oak forests in the central part of the state.
2. Blue: Blue can be used to represent water bodies, including rivers, lakes, and the Gulf of Mexico. The major rivers of Texas, such as the Rio Grande, Brazos River, Trinity River, and Colorado River, can be highlighted in blue.
3. Yellow or Tan: Yellow or tan shades are commonly used to represent desert areas and arid regions. The Chihuahuan Desert in West Texas and the Trans-Pecos region can be shown in these colors.
4. Brown or Gray: Brown or gray shades can represent mountainous terrain and plateaus. The Guadalupe Mountains in West Texas, the Hill Country in Central Texas, and the Llano Uplift can be shaded using these colors.
5. Red or Orange: Red or orange shades can be used to highlight areas with high temperatures, such as the desert regions or the Rio Grande Valley.
6. Purple or Pink: Purple or pink shades are sometimes used to represent metropolitan areas or highly populated regions. Dallas-Fort Worth, Houston, San Antonio, Austin, and El Paso are some of the major cities in Texas that could be shown in these colors.
Remember that these are just some general guidelines, and the specific colors you use may vary depending on the purpose and context of your map.