I have designed an svg
shape, but I'm struggling to get the slope to start from the middle. Can someone please provide assistance?
<svg xmlns="http://www.w3.org/2000/svg" fill="none">
<g filter="url(#filter0_b_1_2556)">
<path
d="M176.291 1H1V115C1 120.523 5.47716 125 11 125H331C336.523 125 341 120.523 341 115V37.4083H213.78C210.647 37.4083 207.695 35.9399 205.805 33.4411L184.266 4.96721C182.376 2.46844 179.424 1 176.291 1Z"
fill="#5B85A4"
fillOpacity="0.80"
/>
<path
d="M176.291 1H1V115C1 120.523 5.47716 125 11 125H331C336.523 125 341 120.523 341 115V37.4083H213.78C210.647 37.4083 207.695 35.9399 205.805 33.4411L184.266 4.96721C182.376 2.46844 179.424 1 176.291 1Z"
stroke="white"
strokeOpacity="0.9"
/>
</g>
<defs>
<filter
id="filter0_b_1_2556"
x="-53.5"
y="-53.5"
width="449"
height="233"
filterUnits="userSpaceOnUse"
colorInterpolationFilters="sRGB"
>
<feFlood floodOpacity="0" result="BackgroundImageFix" />
<feGaussianBlur in="BackgroundImageFix" stdDeviation="27" />
<feComposite
in2="SourceAlpha"
operator="in"
result="effect1_backgroundBlur_1_2556"
/>
<feBlend
mode="normal"
in="SourceGraphic"
in2="effect1_backgroundBlur_1_2556"
result="shape"
/>
</filter>
</defs>
</svg>