What color is #289DCB?

#289DCB is a medium cyan-blue. In RGB it is rgb(40, 157, 203), and in HSL hsl(197, 67%, 48%).

Is #289DCB accessible as text?

On white, #289DCB has a contrast ratio of 3.10:1 (fails WCAG AA for body text); on black it is 6.78:1 (passes). For text placed on #289DCB, use black for the best readability.

What is the closest Tailwind color to #289DCB?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #289DCB?

#289DCB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CC5728. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #289DCB below.

Is #289DCB good for buttons?

#289DCB works well for buttons and highlights, but use black text on #289DCB — white text only reaches 3.10:1, below the 4.5:1 needed for normal-size labels.

Is #289DCB the same as CSS cadetblue?

No — #289DCB is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#289DCB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #289DCB

Not just a swatch — here's how #289DCB works with other colors. Named schemes with #289DCB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #289DCB Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Carolina Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #289DCB Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Carolina Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #289DCB Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #65C2ED

Carolina 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 Carolina Blue.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #289DCB Secondary #A1C1D2 Support #969386 Ink #16140F

Carolina 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 Carolina Blue carrying the quiet middle.

Modern Café Dominant · 5 colors

Dominant #289DCB Anchor #372C1D Surface #EAE5D0 Accent #7C9D76 Secondary #393933

Carolina 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.

Build a working theme in the generator →

Color Lab

How #289DCB 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.

Warmth 14/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 52/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 35/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 42/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 46/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 75/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 31/100

Low

Usable as a tinted surface in measured doses.

Print safety 69/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #289DCB

For UI

For branding

For interior

For fashion

People also use #289DCB with

Medium Aquamarine Cerulean Burnt Orange Platinum Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 6.0:1. Use

Subtle surface Use #D8EAF1 for cards and hover fills. Tint 80

Avoid beside #2867CC — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #289DCB at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #289DCB;
  --color-base-rgb: 40 157 203;
  --color-base-oklch: oklch(65.4% 0.119 230.0);
  --color-50: #F2FAFD;
  --color-100: #DCF1F9;
  --color-200: #BBE2F1;
  --color-300: #8CCAE3;
  --color-400: #62B1D0;
  --color-500: #3F94B5;
  --color-600: #37738B;
  --color-700: #2C5362;
  --color-800: #203741;
  --color-900: #162328;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  carolina-blue: {
    50: '#F2FAFD',
    100: '#DCF1F9',
    200: '#BBE2F1',
    300: '#8CCAE3',
    400: '#62B1D0',
    500: '#3F94B5',
    600: '#37738B',
    700: '#2C5362',
    800: '#203741',
    900: '#162328',
  },
}

$base: #289DCB;
$base-ink: #141310;
$base-50: #F2FAFD;
$base-100: #DCF1F9;
$base-200: #BBE2F1;
$base-300: #8CCAE3;
$base-400: #62B1D0;
$base-500: #3F94B5;
$base-600: #37738B;
$base-700: #2C5362;
$base-800: #203741;
$base-900: #162328;
$base-hover: #207EA4;
$base-subtle: #C3E0EB;

{
    "color": {
        "base": {
            "value": "#289DCB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DCF1F9",
                "type": "color"
            },
            "200": {
                "value": "#BBE2F1",
                "type": "color"
            },
            "300": {
                "value": "#8CCAE3",
                "type": "color"
            },
            "400": {
                "value": "#62B1D0",
                "type": "color"
            },
            "500": {
                "value": "#3F94B5",
                "type": "color"
            },
            "600": {
                "value": "#37738B",
                "type": "color"
            },
            "700": {
                "value": "#2C5362",
                "type": "color"
            },
            "800": {
                "value": "#203741",
                "type": "color"
            },
            "900": {
                "value": "#162328",
                "type": "color"
            }
        }
    }
}

Palettes built on #289DCB

Color Lab

Pairs with #289DCB

UI roles & guardrails

In real applications

Scales

Every model

Export