High-contrast, deep or saturated colours often used to create visual impact.
Black
neutral · very deep
Charcoal
neutral · deep
Burgundy
red · deep
Emerald Green
green · medium
Cobalt Blue
blue · deep
Ruby
red · medium
This group is not held together by any single measurement. It spans L*0 to L*72 and chroma 0 to 75 across 5 hue families (neutral, blue, red, green and pink) — too wide, on both axes, to claim a shared property. The association is cultural and conventional rather than perceptual: these are the colours the idea has come to be expressed in, not colours that measurably resemble each other. Treat the group as a set of separate options rather than a palette that will automatically cohere.
They are not interchangeable. Chroma runs from 0 to 75 and lightness from L*0 to L*72, which is a wide enough saturation spread that the strongest of these will dominate the quietest if you use them at the same scale. Pick one to lead. They also split on undertone (neutral and cool), so pairing across that split is where this group most often goes wrong.
Assessed individually, most of this group comes out strong for trim and joinery, accents and small objects, secondary surfaces, furniture and rugs, curtains and bedding. That is a property of the measurements rather than of the mood label — a colour does not become easier to use on a wall because it is described as clearly coloured but not loud.
At an average chroma of 43 these hold their identity under most lighting — the risk runs the other way. Warm evening light on an already-saturated warm colour can tip it from rich into strident, and these are exactly the colours that look different at 8pm than they did at noon.
The grouping itself is an editorial judgement — a mood is a convention, not a measured property of a wavelength. Everything said about the colours in it above is derived from their measured values. See methodology.
See also: interiors and accessibility guidance for using these colours.