DIY idea:
Scheme colors
Neutrals to pair with it Editorial suggestion
Quick room preview Editorial suggestion
A rough sketch of how the palette could be spread through a room: soft neutral on the wall, the first scheme colors on big pieces, the rest as accents.
Reading the results
Each card lists the color's HEX, RGB and HSL values, plus whichever text color (white or dark) is easier to read on it and the contrast ratio for that pairing. The hue positions come straight from the HSL wheel, so they are exact. The neutrals and the room sketch are suggestions, not calculations.
Pick one color to lead and use the rest in smaller amounts. Then check the result against real paint, fabric or paper, because a screen cannot match them exactly. For the thinking behind each scheme, see Color Harmony and Color Palettes.