Combine white and blue masa harina with salt. Gradually add warm water and knead until soft and smooth, like Play Doh. Form balls, press half white and half blue together, and flatten into tortillas. Sprinkle with sesame seeds and gently press again to embed.
Cook on a dry skillet until just set but still soft. Cover to steam and keep pliable.
If using store-bought tortillas, warm in a damp towel until flexible to prevent cracking.
In a bowl, mix cream cheese, Laughing Cow, garlic chives, garlic powder, soy sauce, and rice vinegar until smooth and creamy. Gently fold in lump crab, keeping the texture chunky. Adjust salt to taste.
Spread 1–2 tablespoons (15–30 g) of filling across the center of each tortilla. Roll tightly and set aside seam side down.
Heat a thin layer of oil in a skillet. Place flautas seam side down and press lightly to seal. Flip and lightly toast the other side.
Heat oil to 350°F (175°C). Fry flautas in batches for 3–4 minutes until golden brown and blistered. Transfer to a rack and season immediately with kosher salt.
Make the Sweet Chili Dipping Sauce. Whisk together sambal, honey, fish sauce, and soy sauce. Adjust sweetness and salt as needed. Serve on the side or spoon over the crispy crab flautas.