Blue-black hair is jet black with a cool blue shimmer that shows in the light. It can be subtle, like a midnight sheen, or bold, with bright cobalt streaks and balayage.
These 19 blue-black hair colour ideas include bobs, ombres, highlights, braids and long, glossy styles. Each one comes with a colour tip.
1. Blue-Black Bob
A blue-black bob looks sleek and modern.
SaveColour tip: Keep the cut blunt for maximum shine.
2. Black to Blue Ombre
A fade from black roots to blue ends is striking.
SaveColour tip: Lighten the ends first so the blue shows.
3. Bob with Blue Highlights
Blue highlights add dimension to a bob.
SaveColour tip: Place them around the face for impact.
4. Short Blue-Black Hair
A short cut shows off the blue sheen.
SaveColour tip: Use a shine spray to boost the reflection.
5. Pastel Blue Highlights
Pastel blue on black looks soft and dreamy.
SaveColour tip: Pastels fade fast, so refresh often.
6. Intense Blue-Black
A deep, saturated blue-black is bold.
SaveColour tip: Choose a blue-black dye for even coverage.
7. Blue-Black Braids
Braids with blue-black hair look striking.
SaveColour tip: Mix blue and black braiding hair.
8. Black and Cobalt Balayage
Cobalt balayage adds vivid colour.
SaveColour tip: Ask for hand-painted sections.
9. Long Black Hair with Blue Highlights
Long hair shows off flowing blue streaks.
SaveColour tip: Use a colour-safe shampoo.
10. Midnight Blue Bob
A midnight blue bob is dark and mysterious.
SaveColour tip: Midnight blue is subtle in low light.
11. Black with Deep Blue Highlights
Deep blue highlights look elegant.
SaveColour tip: Keep highlights fine and blended.
12. Onyx Black with Subtle Blue
A subtle blue sheen on onyx black is understated.
SaveColour tip: Use a blue gloss to add the tint.
13. Bright Blue Highlights
Bright blue streaks are bold and fun.
SaveColour tip: Pre-lighten the strands first.
14. Long Jet Black with Blue Streaks
Bold blue stripes on long black hair stand out.
SaveColour tip: Place streaks in the front sections.
15. Straight Black Hair with Blue Highlights
Straight hair shows off the blue sheen.
SaveColour tip: Flat-iron with heat protectant.
16. Midnight Blue Colour
An all-over midnight blue is rich and cool.
SaveColour tip: Refresh with a blue-depositing conditioner.
17. Rich Blue-Black Hue
A rich blue-black looks glossy and deep.
SaveColour tip: Gloss every four to six weeks.
18. Dimensional Blue and Black
Multiple blue tones add depth.
SaveColour tip: Ask for two or three shades.
19. Dark Blue and Black
A dark blue-black is subtle and elegant.
SaveColour tip: Rinse with cool water.
How to Keep Blue-Black Hair Vibrant
Wash less often
Blue fades with every wash.
Use cool water
Cool water keeps the cuticle closed.
Use colour-depositing products
A blue conditioner refreshes the tint.
Frequently Asked Questions
What is blue-black hair?
Black hair with a cool blue tint or blue highlights.
Does blue-black hair fade?
Yes. The blue fades faster than the black, so refresh it regularly.
Do I need bleach for blue-black hair?
Not for a subtle tint. Bright blue highlights need pre-lightening.
Final Thoughts
Blue-black hair is bold, glossy and full of depth. Try a subtle midnight sheen or bright cobalt highlights.
For more ideas, see our jet black hair colour ideas, black hair with highlights and blue and black braids.
