What color is #669EA9?

#669EA9 is a medium, muted cyan. In RGB it is rgb(102, 158, 169), and in HSL hsl(190, 28%, 53%).

Is #669EA9 accessible as text?

On white, #669EA9 has a contrast ratio of 2.99:1 (fails WCAG AA for body text); on black it is 7.03:1 (passes). For text placed on #669EA9, use black for the best readability.

What is the closest Tailwind color to #669EA9?

The nearest Tailwind CSS token is mist-400 (#9CA8AB).

What colors go well with #669EA9?

#669EA9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A97166. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #669EA9 below.

Is #669EA9 good for buttons?

#669EA9 works well for buttons and highlights, but use black text on #669EA9 — white text only reaches 2.99:1, below the 4.5:1 needed for normal-size labels.

Is #669EA9 the same as CSS cadetblue?

No — #669EA9 is not the CSS named color cadetblue, but cadetblue (#5F9EA0) is the closest CSS named color.

#669EA9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #669EA9

Not just a swatch — here's how #669EA9 works with other colors. Named schemes with #669EA9 in its natural role, and a note on why the supporting colors balance it.

Nordic Calm Accent · 5 colors

Accent #669EA9 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 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 #669EA9 Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1E3549

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 #669EA9 Surface #ECEADC Highlight #F4F2E7 Secondary #B4B19F 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 #669EA9 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #90C3CD

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 #669EA9 Secondary #B0C3C7 Support #979286 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 #669EA9 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 33/100

Cool

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

Softness 61/100

High

Middle-weight — neither delicate nor heavy.

Depth 32/100

Low

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

Naturalness 3/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 39/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 24/100

Low

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

UI accent fit 57/100

Moderate

Workable accent with care around contrast.

Surface fit 50/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #669EA9

For UI

For branding

For interior

For fashion

People also use #669EA9 with

Dark Sea Green Glaucous Mocha 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 Only on dark surfaces. Avoid

Background Pair with #141310 text at 6.2:1. Use

Subtle surface Use #E2EAEC for cards and hover fills. Tint 80

Avoid beside #6687A9 — 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 #669EA9 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: #669EA9;
  --color-base-rgb: 102 158 169;
  --color-base-oklch: oklch(66.5% 0.061 211.3);
  --color-50: #F5F9FA;
  --color-100: #E5EFF1;
  --color-200: #CBDEE2;
  --color-300: #A6C4CA;
  --color-400: #82A8B0;
  --color-500: #628B93;
  --color-600: #4F6D72;
  --color-700: #3C4F53;
  --color-800: #2A3537;
  --color-900: #1B2122;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  cadet-blue: {
    50: '#F5F9FA',
    100: '#E5EFF1',
    200: '#CBDEE2',
    300: '#A6C4CA',
    400: '#82A8B0',
    500: '#628B93',
    600: '#4F6D72',
    700: '#3C4F53',
    800: '#2A3537',
    900: '#1B2122',
  },
}

$base: #669EA9;
$base-ink: #141310;
$base-50: #F5F9FA;
$base-100: #E5EFF1;
$base-200: #CBDEE2;
$base-300: #A6C4CA;
$base-400: #82A8B0;
$base-500: #628B93;
$base-600: #4F6D72;
$base-700: #3C4F53;
$base-800: #2A3537;
$base-900: #1B2122;
$base-hover: #4E808A;
$base-subtle: #D3E0E3;

{
    "color": {
        "base": {
            "value": "#669EA9",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F9FA",
                "type": "color"
            },
            "100": {
                "value": "#E5EFF1",
                "type": "color"
            },
            "200": {
                "value": "#CBDEE2",
                "type": "color"
            },
            "300": {
                "value": "#A6C4CA",
                "type": "color"
            },
            "400": {
                "value": "#82A8B0",
                "type": "color"
            },
            "500": {
                "value": "#628B93",
                "type": "color"
            },
            "600": {
                "value": "#4F6D72",
                "type": "color"
            },
            "700": {
                "value": "#3C4F53",
                "type": "color"
            },
            "800": {
                "value": "#2A3537",
                "type": "color"
            },
            "900": {
                "value": "#1B2122",
                "type": "color"
            }
        }
    }
}

Palettes built on #669EA9

Color Lab

Pairs with #669EA9

UI roles & guardrails

In real applications

Scales

Every model

Export