What color is #669CDE?

#669CDE is a light, soft blue. In RGB it is rgb(102, 156, 222), and in HSL hsl(213, 65%, 64%).

Is #669CDE accessible as text?

On white, #669CDE has a contrast ratio of 2.85:1 (fails WCAG AA for body text); on black it is 7.38:1 (passes). For text placed on #669CDE, use black for the best readability.

What is the closest Tailwind color to #669CDE?

The nearest Tailwind CSS token is blue-400 (#51A2FF).

What colors go well with #669CDE?

#669CDE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #DFA968. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #669CDE below.

Is #669CDE good for buttons?

#669CDE works well for buttons and highlights, but use black text on #669CDE — white text only reaches 2.85:1, below the 4.5:1 needed for normal-size labels.

Is #669CDE the same as CSS cornflowerblue?

No — #669CDE is not the CSS named color cornflowerblue, but cornflowerblue (#6495ED) is the closest CSS named color.

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

Palettes built on #669CDE

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

Coastal Morning Lead · 5 colors

Lead #669CDE Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #669CDE Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #669CDE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #90C2FF

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 #669CDE Secondary #B4C7DF Support #9D8F89 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 #669CDE Anchor #3B2924 Surface #EAE5D0 Accent #799E78 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 #669CDE 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 19/100

Cool

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

Softness 55/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 32/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 0/100

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 44/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 65/100

High

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

Surface fit 35/100

Low

Usable as a tinted surface in measured doses.

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #669CDE

For UI

For branding

For interior

For fashion

People also use #669CDE with

Powder Blue Medium Slate Blue Fawn Gainsboro 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 Only on dark surfaces. Avoid

Background Pair with #141310 text at 6.5:1. Use

Subtle surface Use #E4ECF5 for cards and hover fills. Tint 80

Avoid beside #6875DF — 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 #669CDE 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: #669CDE;
  --color-base-rgb: 102 156 222;
  --color-base-oklch: oklch(68.3% 0.114 254.2);
  --color-50: #F2F7FD;
  --color-100: #DDE9F9;
  --color-200: #BCD4F1;
  --color-300: #8EB3E2;
  --color-400: #6394CF;
  --color-500: #4175B4;
  --color-600: #385D89;
  --color-700: #2D4562;
  --color-800: #212F40;
  --color-900: #161E27;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  carolina-blue: {
    50: '#F2F7FD',
    100: '#DDE9F9',
    200: '#BCD4F1',
    300: '#8EB3E2',
    400: '#6394CF',
    500: '#4175B4',
    600: '#385D89',
    700: '#2D4562',
    800: '#212F40',
    900: '#161E27',
  },
}

$base: #669CDE;
$base-ink: #141310;
$base-50: #F2F7FD;
$base-100: #DDE9F9;
$base-200: #BCD4F1;
$base-300: #8EB3E2;
$base-400: #6394CF;
$base-500: #4175B4;
$base-600: #385D89;
$base-700: #2D4562;
$base-800: #212F40;
$base-900: #161E27;
$base-hover: #327AD3;
$base-subtle: #D6E2F1;

{
    "color": {
        "base": {
            "value": "#669CDE",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F7FD",
                "type": "color"
            },
            "100": {
                "value": "#DDE9F9",
                "type": "color"
            },
            "200": {
                "value": "#BCD4F1",
                "type": "color"
            },
            "300": {
                "value": "#8EB3E2",
                "type": "color"
            },
            "400": {
                "value": "#6394CF",
                "type": "color"
            },
            "500": {
                "value": "#4175B4",
                "type": "color"
            },
            "600": {
                "value": "#385D89",
                "type": "color"
            },
            "700": {
                "value": "#2D4562",
                "type": "color"
            },
            "800": {
                "value": "#212F40",
                "type": "color"
            },
            "900": {
                "value": "#161E27",
                "type": "color"
            }
        }
    }
}

Palettes built on #669CDE

Color Lab

Pairs with #669CDE

UI roles & guardrails

In real applications

Scales

Every model

Export