Function hex

src/utils/color.ts:399–408

(i: number)

    }

    const hex = (i: number) => {
        const c = $hex.charCodeAt(i);
        if (c >= C_A && c <= C_F) {
            return c + 10 - C_A;
        }
        if (c >= C_a && c <= C_f) {
            return c + 10 - C_a;
        }
        return c - C_0;
    };

    let r: number;
    let g: number;