What color is #669BAE?

#669BAE is a medium, muted cyan-blue. In RGB it is rgb(102, 155, 174), and in HSL hsl(196, 31%, 54%).

Is #669BAE accessible as text?

On white, #669BAE has a contrast ratio of 3.06:1 (fails WCAG AA for body text); on black it is 6.86:1 (passes). For text placed on #669BAE, use black for the best readability.

What is the closest Tailwind color to #669BAE?

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

What colors go well with #669BAE?

#669BAE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AE7965. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #669BAE below.

Is #669BAE good for buttons?

#669BAE works well for buttons and highlights, but use black text on #669BAE — white text only reaches 3.06:1, below the 4.5:1 needed for normal-size labels.

Is #669BAE the same as CSS cadetblue?

No — #669BAE is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#669BAE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #669BAE

Not just a swatch — here's how #669BAE works with other colors. Named schemes with #669BAE in its natural role, and a note on why the supporting colors balance it.

Nordic Calm Accent · 5 colors

Accent #669BAE Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

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

Coastal Morning Lead · 5 colors

Lead #669BAE Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E354A

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

Japanese Sand Base · 5 colors

Base #669BAE Surface #ECEADC Highlight #F4F2E7 Secondary #B3B19F Ink #2A2723

Cadet Blue sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Tech Product Signal · 5 colors

Signal #669BAE Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #90C0D2

Cadet 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 Cadet Blue.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #669BAE Secondary #AFC1C8 Support #969386 Ink #16140F

Cadet 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 Cadet Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #669BAE 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 31/100

Cool

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

Softness 60/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 33/100

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 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 40/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 24/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 59/100

Moderate

Workable accent with care around contrast.

Surface fit 49/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #669BAE

For UI

For branding

For interior

For fashion

People also use #669BAE with

Dark Sea Green Very Peri Beaver Platinum Dark Slate Gray

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 6.1:1. Use

Subtle surface Use #E2EAED for cards and hover fills. Tint 80

Avoid beside #6582AE — 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 #669BAE 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: #669BAE;
  --color-base-rgb: 102 155 174;
  --color-base-oklch: oklch(65.9% 0.063 222.6);
  --color-50: #F5F9FA;
  --color-100: #E4EEF1;
  --color-200: #CADCE3;
  --color-300: #A4C1CC;
  --color-400: #7FA5B3;
  --color-500: #5F8796;
  --color-600: #4E6A74;
  --color-700: #3B4D54;
  --color-800: #293438;
  --color-900: #1A2123;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  cadet-blue: {
    50: '#F5F9FA',
    100: '#E4EEF1',
    200: '#CADCE3',
    300: '#A4C1CC',
    400: '#7FA5B3',
    500: '#5F8796',
    600: '#4E6A74',
    700: '#3B4D54',
    800: '#293438',
    900: '#1A2123',
  },
}

$base: #669BAE;
$base-ink: #141310;
$base-50: #F5F9FA;
$base-100: #E4EEF1;
$base-200: #CADCE3;
$base-300: #A4C1CC;
$base-400: #7FA5B3;
$base-500: #5F8796;
$base-600: #4E6A74;
$base-700: #3B4D54;
$base-800: #293438;
$base-900: #1A2123;
$base-hover: #4C7E90;
$base-subtle: #D4E0E4;

{
    "color": {
        "base": {
            "value": "#669BAE",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F9FA",
                "type": "color"
            },
            "100": {
                "value": "#E4EEF1",
                "type": "color"
            },
            "200": {
                "value": "#CADCE3",
                "type": "color"
            },
            "300": {
                "value": "#A4C1CC",
                "type": "color"
            },
            "400": {
                "value": "#7FA5B3",
                "type": "color"
            },
            "500": {
                "value": "#5F8796",
                "type": "color"
            },
            "600": {
                "value": "#4E6A74",
                "type": "color"
            },
            "700": {
                "value": "#3B4D54",
                "type": "color"
            },
            "800": {
                "value": "#293438",
                "type": "color"
            },
            "900": {
                "value": "#1A2123",
                "type": "color"
            }
        }
    }
}

Palettes built on #669BAE

Color Lab

Pairs with #669BAE

UI roles & guardrails

In real applications

Scales

Every model

Export