There are a number of shades of blue that work really beautifully alongside copper. Cobalt blue stands out and really creates a centrepiece. You could try a blue rug, or sofa alongside copper plant pots, tables or floor lamps. Navy blue brings an even deeper tone.
Copper and Light Blue
Complement copper's warmth by pairing it with cool tones from across the color wheel, like pale blues and greens. The copper pipe shelf in this kitchen by Perfect Trades creates an eclectic and cozy atmosphere — we can imagine drying herbs and making tea here.
Consider Your Palette:
Warm metals (like gold, brass, and copper) pair well with warm hues (like reds, browns, and yellows) while cool metals (such as chrome and silver) pair well with with cool hues (such as blue, green, and violet).
The characteristic bluish-green color of the flame is due to the copper.
Combination #2 - Brass and Copper
This kitchen by Heidi Caillier shows just how beautiful of a pairing these metals are. Caillier decided to all brass for the kitchen's functional cabinet hardware, while sprinkling in some copper accents (the pendant lights and tea kettle).
Chemical properties
Copper is incompatible with alkali solutions, sodium azide and acetylene. Copper can react with strong oxidants like chlorates, bromates and iodates, causing an explosion hazard.
The natural weathering of copper to the characteristic blue-green or gray-green patina is a direct consequence of the mild corrosive attack of airborne sulfur compounds. In the atmosphere, these compounds combine with water vapor to form dilute oxidizing acids which react with copper surfaces.
Looking at the light intensity spectrum of copper, when light is shined upon copper metal, the copper atoms absorb some of the light in the blue-green region of the spectrum (see Figure 2). When an object absorbs one color of light, its complementary color (see the color wheel on page 2) is reflected back to our eyes.
Brass. If you're a fan of the blue and yellow primary pair, you'll love this elevated option. Pairing a deep, rich blue, like this navy kitchen, with a metallic brass accent is a great way to add some glamour and texture to your space.
Steel begins to turn blue at about 575ºF, but the best temperature range for heat-bluing is pretty narrow. Blue is preceded by brown (about 480ºF) and then purple (500º to about 540º) so it's quite easy to overshoot or undershoot.
If you look at a color wheel, the shade opposite blue and green would be orange and red. So you'll need to mix equal parts copper and red hair dye to cancel the color out.
copper / orange opposite green and blue.
Copper metal is a reddish brown solid. B – Copper(II) carbonate is a green solid/powder. D – Copper(II) oxide is a black solid. E – Copper(II) hydroxide is a blue precipitate.
And stray copper can cause green and blue flames in other settings, for example, wood with copper-based fungicides or paper with copper in the ink or copper staples. But if you're burning yard waste or plain waste paper, copper is very unlikely to be present to cause a colored flame.
Copper/Brass can grow a greenish to blue corrosion on it. In the ground, natural copper has blue green gunk growing with the dirt around the deposit.
There is no way to create black fire because when it comes to light black is the absence of light not the mixture of all the colors light can produce. Although pigments which refers to paint, mixing them would create black paint but there is no way to make black fire sorry.
Introduction: Blue Patina on Copper
There are many ways to add colour into Jewellery work, applying patinas are one of the simplest methods; requiring very little equipment or in some kinds expense. Copper takes a patina especially well.
It reacts with oxygen in the air to form brown-black copper oxides, with CO2 dissolved in rainwater to form green, and sulfur compounds to form copper sulfides.
Like some other metals, it oxidizes when left out in the elements, but the coloring process is complicated. Copper has a beautiful reddish hue, but when exposed to the elements, the metal undergoes a series of chemical reactions that make it turn green.
Copper, of course, is a popular choice, but lighter shades such as white, grey, or natural wood work beautifully to brighten and balance the blue. For a bolder look, consider integrating orange, gold, or even brass accents.
What Not to Wear: The sunny shades of yellow and orange are too strong. True white isn't as good of a choice as off-white or cream. Pink, especially bubble gum pink, doesn't really flatter, but a bolder pink might. Red clothing isn't a great color for red hair, especially orange-red or burgundy.
Pure copper is orange-red and acquires a reddish tarnish when exposed to air. This is due to the low plasma frequency of the metal, which lies in the red part of the visible spectrum, causing it to absorb the higher-frequency green and blue colors.