#03998F is a mid-toned, cool cyan. It carries a legible label as a UI accent and sits well as a supporting tone.
Not just a swatch — here's how #03998F works with other colors. Named schemes with #03998F in its natural role, and a note on why the supporting colors balance it.
Persian Green opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.
Persian Green plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.
Persian Green 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.
Persian Green sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.
Persian Green 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 Persian Green carrying the quiet middle.
How #03998F 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 #03998F at work across the surfaces designers actually ship.
:root {
--color-base: #03998F;
--color-base-rgb: 3 153 143;
--color-base-oklch: oklch(61.5% 0.107 186.7);
--color-50: #F0FEFD;
--color-100: #D8FDFB;
--color-200: #B1FCF7;
--color-300: #7AF6ED;
--color-400: #4AE8DE;
--color-500: #26CFC4;
--color-600: #259D95;
--color-700: #216E69;
--color-800: #194844;
--color-900: #122C2A;
--color-on-base: #141310;
}
// tailwind.config.js
colors: {
persian-green: {
50: '#F0FEFD',
100: '#D8FDFB',
200: '#B1FCF7',
300: '#7AF6ED',
400: '#4AE8DE',
500: '#26CFC4',
600: '#259D95',
700: '#216E69',
800: '#194844',
900: '#122C2A',
},
}
$base: #03998F; $base-ink: #141310; $base-50: #F0FEFD; $base-100: #D8FDFB; $base-200: #B1FCF7; $base-300: #7AF6ED; $base-400: #4AE8DE; $base-500: #26CFC4; $base-600: #259D95; $base-700: #216E69; $base-800: #194844; $base-900: #122C2A; $base-hover: #037C74; $base-subtle: #A4F1EC;
{
"color": {
"base": {
"value": "#03998F",
"type": "color"
},
"onBase": {
"value": "#141310",
"type": "color"
},
"scale": {
"50": {
"value": "#F0FEFD",
"type": "color"
},
"100": {
"value": "#D8FDFB",
"type": "color"
},
"200": {
"value": "#B1FCF7",
"type": "color"
},
"300": {
"value": "#7AF6ED",
"type": "color"
},
"400": {
"value": "#4AE8DE",
"type": "color"
},
"500": {
"value": "#26CFC4",
"type": "color"
},
"600": {
"value": "#259D95",
"type": "color"
},
"700": {
"value": "#216E69",
"type": "color"
},
"800": {
"value": "#194844",
"type": "color"
},
"900": {
"value": "#122C2A",
"type": "color"
}
}
}
}