How to Change the Intensity of an iPhone Filter

Changing Color Blindness Filter Intensity

Open the Settings app.

Tap General.

Tap Accessibility.

Tap Display Accommodations.

Tap Color Filters.

Tap the grey "Color Filters" switch. This will enable color filters for colorblind iPhone users.

Tap your preferred filter. Your choices include the following: Grayscale Red/Green Filter Green/Red Filter Blue/Yellow Filter Color Tint

Drag the "Intensity" slider left or right. Dragging it to the right will increase filter intensity, while dragging it to the left will decrease filter intensity.

Tap < Back. Your changes will be saved.

Changing Photo Filter Intensity

Open the Photos app.

Tap a photo you'd like to edit. If you're using the "Albums" view, you'll have to tap an album to open it first.

Tap the edit button. This is the set of horizontal lines with sliders at the bottom of your screen.

Tap the color adjust button. It's the circle icon surrounded by dots at the bottom of your screen.

Tap Color or B&W. The "Color" button is for photos with a color filter, while the "B&W" button covers black and white photos.

Swipe the color slider right or left. It's at the bottom of the screen. Swiping to the left increases your filter's intensity, while swiping to the right decreases it.

Tap Done. This will save your changes. You can also tap Cancel and then Discard Changes to revert to the original photo.