Text Color on Background
Work out whether black or white text belongs on any colour.
Build a whole palette from one hue, and nothing else.
The palette appears here
The Monochromatic Palette Generator builds a full palette from a single hue, with a tapered saturation curve so the light end does not go chalky and the dark end does not go muddy, plus a matched neutral that carries a trace of your colour.
A monochromatic palette uses one hue and varies only how light and how saturated it is. It is the hardest scheme to get wrong and the easiest to make look deliberate, which is why so many products that look expensive turn out to be built from one colour and a grey.
This generates the full range from a single colour: deep shades for text, mid tones for buttons and states, pale tints for backgrounds and borders, each spaced perceptually so the steps look even rather than crowding at one end.
The saturation curve is what separates a generated ramp from a designed one. Holding saturation constant across the whole range makes the light end look chalky and the dark end muddy; real palettes taper it at both ends. The tool applies that curve by default and lets you flatten it if you want the mechanical version. A matching neutral grey is derived from your hue too — one with a trace of the same colour in it, which is what keeps greys from looking like they came from a different design.
Eased off at both extremes, which is what designed palettes do and what generated ones usually miss.
Greys derived from your hue, so they read as part of the palette rather than borrowed from elsewhere.
Steps that look even across the whole range instead of crowding at the light end.
Every step scored, so the text shades and the background shades separate themselves.
CSS variables, Tailwind tokens or a plain list.
One colour. Everything else is derived from it.
How many steps, and how far into the light and dark ends to go.
Tapered at the ends by default, which is what designed palettes do.
Copy it as CSS variables, Tailwind tokens or a list of HEX codes.
It rarely is in practice, because interfaces get most of their variety from layout, type and imagery rather than hue. One colour plus a matched neutral covers nearly everything; a single accent hue can be added where something needs to stand out.
Take one colour from a different hue and use it sparingly — one call to action, one highlight. The moment it appears twice on a screen it stops being an accent and the scheme becomes something else.
Because full saturation at the light end reads as chalky and at the dark end as muddy. Real palettes ease off at both extremes, which is what makes the ends feel like part of the same family.
Usually not. A grey carrying a trace of your hue reads as belonging to the palette, where a pure neutral grey next to a warm brand colour looks slightly wrong without anyone being able to say why.
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Write the first reviewWork out whether black or white text belongs on any colour.
Turn one colour into a full 50–950 Tailwind scale.
Convert HSL to HEX and back, with the maths written out.
Check whether a colour code is valid, and fix it if not.
Turn a HEX code into SwiftUI Color, UIColor and NSColor code.
Score a colour pair with APCA, the contrast model behind WCAG 3.
Build radial gradients with full control of shape and position.
Build a moving gradient background with the keyframes included.