技术问题语段：
When expressing heterogeneous colors on a single surface, the color should be printed two or more times, and when it is desired to apply a variety of colors to a three-dimensional pattern, it is practically difficult to implement the expression of the colors.|Further, in the existing decoration film, the color is fixed according to a viewing angle and even though there is a slight change, the change is limited to a difference degree of the color sense.
权利要求：
1. A decoration member comprising: a color expression layer (100) comprising a light reflection layer (201) and a light absorption layer (301) provided on the light reflection layer (201); and a substrate (101) provided on one surface of the color expression layer (100), wherein the light absorption layer (301) comprises a copper nickel oxide (CuaNibOx), and ω represented by Equation 1 is in a range of 0.001 to 0.7 when a component analysis is performed with respect to any one point of the light absorption layer (301): ω = T x × σ x f T 1 = T 1 T 0 <mspace width="1ex" /> 0 < T 1 ≤ T 0 f T 1 = f T 1 + n × T 0 σ x = a + b x × 1.2 wherein, in Equation 1, Tx represents a function value depending on T1 of a function represented by the f(T1), n represents a positive integer of 1 or more, and σx is represented by Equation 3, wherein, in Equation 2, T1 represents a thickness of the light absorption layer (301) comprising any one point of the light absorption layer (301) in which the component analysis is performed and T0 is 60 nm, and wherein, in Equation 3, a means an element content ratio of copper (Cu), b means an element content ratio of nickel (Ni), and x means an element content ratio of oxygen (O).
2. The decoration member of claim 1, wherein Tx is in a range of 0.01 to 0.5.
3. The decoration member of claim 1, wherein σx is in a range of 0.1 to 5.
4. The decoration member of claim 1, wherein a Hue-angle h* in CIE LCh color space of the light absorption layer (301) is in a range of 315 to 360° and 0 to 150°.
5. The decoration member of claim 1, wherein the light reflection layer (201) is constituted by a single layer or multiple layers comprising one or more types of materials selected from the group consisting of indium (In), titanium (Ti), and tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), Iron (Fe), chromium (Cr), cobalt (Co), gold (Au), and silver (Ag); an oxide, nitride, or an oxynitride thereof; carbon and a carbon composite.
6. The decoration member of claim 1, wherein the light absorption layer (301) has a refractive index of 0 to 8 at a wavelength of 400 nm.
7. The decoration member of claim 1, wherein the light absorption layer (301) has an extinction coefficient of greater than 0 and less than or equal to 4 at a wavelength of 400 nm.
8. The decoration member of claim 1, wherein the light absorption layer (301) comprises two or more points having different thicknesses.
9. The decoration member of claim 1, wherein the color expression layer (100) further comprises a color film (401).
10. The decoration member of claim 1, wherein the color expression layer (100) or the substrate (101) comprises a pattern layer.
11. The decoration member of claim 10, wherein the pattern layer comprises a convex or concave shape having a cross section having an asymmetric structure.
12. The decoration member of claim 1, wherein the decoration member has dichroism of ΔE∗ab > 1.
13. The decoration member of claim 1, wherein the substrate (101) comprises a plastic injection molding or a glass substrate for a cosmetic case.
14. The decoration member of claim 13, wherein the plastic injection molding comprises at least one of polypropylene (PP), polystyrene (PS), polyvinylacetate (PVAc), polyacrylate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), ethylene-vinyl acetate copolymer (EVA), polycarbonate (PC), polyamide and styrene-acrylonitrile copolymer (SAN).