NeoPixel Ring help

Hello new to this type of coding. What I've been trying to do is basically have a blue light chase around the ring. But I just can't seem to get the color to go blue, instead it just does rgbw... Code below for what I have. Any and all help will be appreciated -thanks

#include <Adafruit_NeoPixel.h>

#define PIN 6
#define N_LEDS 144

Adafruit_NeoPixel strip = Adafruit_NeoPixel(N_LEDS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {

void loop() {
chase(strip.Color(0, 0, 255)); // Blue

static void chase(uint32_t c) {
for(uint16_t i=0; i<strip.numPixels()+4; i++) {
strip.setPixelColor(i , c); // Draw new pixel
strip.setPixelColor(i-4, 0); // Erase pixel a few steps back;

You have told your strip object that the pixels connected to pin six are a GRB type. The neopixel library provides every permutation of LED configurations - try NEO_RGBW ,or NEO_BGRW, or some other permutation. Better still - find the docs four your particular hardware and read what they say.