How to use the @pixi/utils.string2hex function in @pixi/utils

context.clearRect(0, 0, this.canvas.width, this.canvas.height);

        context.font = this._font;
        context.strokeStyle = style.stroke;
        context.lineWidth = style.strokeThickness;
        context.textBaseline = style.textBaseline;
        context.lineJoin = style.lineJoin;
        context.miterLimit = style.miterLimit;

        let linePositionX;
        let linePositionY;

        if (style.dropShadow)
        {
            const dropShadowColor = style.dropShadowColor;
            const rgb = hex2rgb(typeof dropShadowColor === 'number' ? dropShadowColor : string2hex(dropShadowColor));

            context.shadowColor = `rgba(${rgb[0] * 255},${rgb[1] * 255},${rgb[2] * 255},${style.dropShadowAlpha})`;
            context.shadowBlur = style.dropShadowBlur;
            context.shadowOffsetX = Math.cos(style.dropShadowAngle) * style.dropShadowDistance;
            context.shadowOffsetY = Math.sin(style.dropShadowAngle) * style.dropShadowDistance;
        }
        else
        {
            context.shadowColor = 0;
            context.shadowBlur = 0;
            context.shadowOffsetX = 0;
            context.shadowOffsetY = 0;
        }

        // set canvas text styles
        context.fillStyle = this._generateFillStyle(style, lines);