A decoration member comprising: a color developing layer including a light reflective layer and a light absorbing layer provided on the light reflective layer; and a substrate provided on one surface of the color developing layer, wherein: the light absorbing layer includes a copper oxynitride (Cu a O b N c); and when a component analysis is performed through a transmission X-ray analysis on an any one point of the light absorbing layer, ω represented by Equation 1 is 0.71 or greater: ω = T x × σ x wherein: - T x is 1, if T 1 = m × T 0, m being an integer, - if not, T x is determined according to Equation 2: Tx = T 1 − T 1 T 0 × T 0 × T 0 − 1 σ x is represented by Equation 3: σ x = 10 b a − 3 c in Equation 2, T 1 is a thickness of the light absorbing layer including any one point of the light absorbing layer on which the component analysis is performed, T 1 T 0 is a maximum integer that is not greater than T 1 T 0, T 0 is 70 nm, in Equation 3, a means an element content ratio of copper (Cu), b means an element content ratio of oxygen, and c means an element content ratio of nitrogen, σ x is greater than or equal to 1.1 and less than or equal to 1.9, the thickness T 1 of the light absorbing layer is 1 nm to 300 nm. a color developing layer including a light reflective layer and a light absorbing layer provided on the light reflective layer; and a substrate provided on one surface of the color developing layer, wherein: the light absorbing layer includes a copper oxynitride (Cu a O b N c); and when a component analysis is performed through a transmission X-ray analysis on an any one point of the light absorbing layer, ω represented by Equation 1 is 0.71 or greater: ω = T x × σ x wherein: - T x is 1, if T 1 = m × T 0, m being an integer, - if not, T x is determined according to Equation 2: Tx = T 1 − T 1 T 0 × T 0 × T 0 − 1 σ x is represented by Equation 3: σ x = 10 b a − 3 c in Equation 2, T 1 is a thickness of the light absorbing layer including any one point of the light absorbing layer on which the component analysis is performed, T 1 T 0 is a maximum integer that is not greater than T 1 T 0, T 0 is 70 nm, in Equation 3, a means an element content ratio of copper (Cu), b means an element content ratio of oxygen, and c means an element content ratio of nitrogen, σ x is greater than or equal to 1.1 and less than or equal to 1.9, the thickness T 1 of the light absorbing layer is 1 nm to 300 nm. the light absorbing layer includes a copper oxynitride (Cu a O b N c); and when a component analysis is performed through a transmission X-ray analysis on an any one point of the light absorbing layer, ω represented by Equation 1 is 0.71 or greater: ω = T x × σ x wherein: - T x is 1, if T 1 = m × T 0, m being an integer, - if not, T x is determined according to Equation 2: Tx = T 1 − T 1 T 0 × T 0 × T 0 − 1 - T x is 1, if T 1 = m × T 0, m being an integer, - if not, T x is determined according to Equation 2: Tx = T 1 − T 1 T 0 × T 0 × T 0 − 1 σ x is represented by Equation 3: σ x = 10 b a − 3 c in Equation 2, T 1 is a thickness of the light absorbing layer including any one point of the light absorbing layer on which the component analysis is performed, T 1 T 0 is a maximum integer that is not greater than T 1 T 0, T 0 is 70 nm, in Equation 3, a means an element content ratio of copper (Cu), b means an element content ratio of oxygen, and c means an element content ratio of nitrogen, σ x is greater than or equal to 1.1 and less than or equal to 1.9, the thickness T 1 of the light absorbing layer is 1 nm to 300 nm.