#688FCA is a mid-toned, cool indigo. On the Color Lab it reads clean and engineered. It carries a legible label as a UI accent and reproduces cleanly in print.
Not just a swatch — here's how #688FCA works with other colors. Named schemes with #688FCA in its natural role, and a note on why the supporting colors balance it.
Ocean Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Ocean Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.
Ocean Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Ocean Blue.
Ocean Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Ocean Blue carrying the quiet middle.
Ocean Blue anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.
How #688FCA actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.
Not a swatch to memorise — a color to build with. Here is #688FCA at work across the surfaces designers actually ship.
:root {
--color-base: #688FCA;
--color-base-rgb: 104 143 202;
--color-base-oklch: oklch(64.6% 0.099 258.5);
--color-50: #F3F7FB;
--color-100: #E0E9F5;
--color-200: #C3D2EA;
--color-300: #99B1D7;
--color-400: #7191C1;
--color-500: #5072A5;
--color-600: #435B7F;
--color-700: #34445B;
--color-800: #252E3C;
--color-900: #181D25;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
ocean-blue: {
50: '#F3F7FB',
100: '#E0E9F5',
200: '#C3D2EA',
300: '#99B1D7',
400: '#7191C1',
500: '#5072A5',
600: '#435B7F',
700: '#34445B',
800: '#252E3C',
900: '#181D25',
},
}
$base: #688FCA; $base-ink: #141310; $base-50: #F3F7FB; $base-100: #E0E9F5; $base-200: #C3D2EA; $base-300: #99B1D7; $base-400: #7191C1; $base-500: #5072A5; $base-600: #435B7F; $base-700: #34445B; $base-800: #252E3C; $base-900: #181D25; $base-hover: #406FB5; $base-subtle: #D5DEEC;
{
"color": {
"base": {
"value": "#688FCA",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F3F7FB",
"type": "color"
},
"100": {
"value": "#E0E9F5",
"type": "color"
},
"200": {
"value": "#C3D2EA",
"type": "color"
},
"300": {
"value": "#99B1D7",
"type": "color"
},
"400": {
"value": "#7191C1",
"type": "color"
},
"500": {
"value": "#5072A5",
"type": "color"
},
"600": {
"value": "#435B7F",
"type": "color"
},
"700": {
"value": "#34445B",
"type": "color"
},
"800": {
"value": "#252E3C",
"type": "color"
},
"900": {
"value": "#181D25",
"type": "color"
}
}
}
}