diff --git a/esphome/components/mipi_rgb/mipi_rgb.cpp b/esphome/components/mipi_rgb/mipi_rgb.cpp
index 7ff6868c15f..ae7c7958464 100644
--- a/esphome/components/mipi_rgb/mipi_rgb.cpp
+++ b/esphome/components/mipi_rgb/mipi_rgb.cpp
@@ -288,9 +288,7 @@ void MipiRgb::draw_pixel_at(int x, int y, Color color) {
   if (!this->check_buffer_())
     return;
   size_t pos = (y * this->width_) + x;
-  uint8_t hi_byte = static_cast<uint8_t>(color.r & 0xF8) | (color.g >> 5);
-  uint8_t lo_byte = static_cast<uint8_t>((color.g & 0x1C) << 3) | (color.b >> 3);
-  uint16_t new_color = hi_byte | (lo_byte << 8);  // big endian
+  uint16_t new_color = convert_big_endian(display::ColorUtil::color_to_565(color));
   if (this->buffer_[pos] == new_color)
     return;
   this->buffer_[pos] = new_color;
@@ -315,10 +313,12 @@ void MipiRgb::fill(Color color) {
   }
 
   auto *ptr_16 = reinterpret_cast<uint16_t *>(this->buffer_);
-  uint8_t hi_byte = static_cast<uint8_t>(color.r & 0xF8) | (color.g >> 5);
-  uint8_t lo_byte = static_cast<uint8_t>((color.g & 0x1C) << 3) | (color.b >> 3);
-  uint16_t new_color = lo_byte | (hi_byte << 8);  // little endian
+  uint16_t new_color = convert_big_endian(display::ColorUtil::color_to_565(color));
   std::fill_n(ptr_16, this->width_ * this->height_, new_color);
+  this->x_low_ = 0;
+  this->y_low_ = 0;
+  this->x_high_ = this->width_ - 1;
+  this->y_high_ = this->height_ - 1;
 }
 
 int MipiRgb::get_width() {