What color is #667BCC?

#667BCC is a medium blue. In RGB it is rgb(102, 123, 204), and in HSL hsl(228, 50%, 60%).

Is #667BCC accessible as text?

On white, #667BCC has a contrast ratio of 3.98:1 (fails WCAG AA for body text); on black it is 5.27:1 (passes). For text placed on #667BCC, use black for the best readability.

What is the closest Tailwind color to #667BCC?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #667BCC?

#667BCC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CCB866. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #667BCC below.

Is #667BCC good for buttons?

#667BCC works well for buttons and highlights, but use black text on #667BCC — white text only reaches 3.98:1, below the 4.5:1 needed for normal-size labels.

Is #667BCC the same as CSS steelblue?

No — #667BCC is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#667BCC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #667BCC

Not just a swatch — here's how #667BCC works with other colors. Named schemes with #667BCC in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #667BCC Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Tech Product Signal · 5 colors

Signal #667BCC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #8CA1ED

Glaucous is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Glaucous.

Vintage Leather Lead · 5 colors

Lead #667BCC Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

Glaucous plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #667BCC Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Glaucous sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #667BCC Secondary #A1ABC8 Support #9D8F88 Ink #18140F

Glaucous 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 Glaucous carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #667BCC 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 22/100

Cool

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

Softness 47/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 40/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 34/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 90/100

Very high

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

Surface fit 24/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 79/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #667BCC

For UI

For branding

For interior

For fashion

People also use #667BCC with

Sky Blue Amethyst Dark Khaki Gainsboro Gunmetal 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 4.7:1. Use

Subtle surface Use #E3E6F2 for cards and hover fills. Tint 80

Avoid beside #7466CC — 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 #667BCC 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: #667BCC;
  --color-base-rgb: 102 123 204;
  --color-base-oklch: oklch(60.3% 0.126 271.2);
  --color-50: #F3F5FC;
  --color-100: #E0E4F5;
  --color-200: #C2CAEB;
  --color-300: #97A4D8;
  --color-400: #7080C2;
  --color-500: #4E60A6;
  --color-600: #424E80;
  --color-700: #333B5C;
  --color-800: #24293C;
  --color-900: #181B25;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F3F5FC',
    100: '#E0E4F5',
    200: '#C2CAEB',
    300: '#97A4D8',
    400: '#7080C2',
    500: '#4E60A6',
    600: '#424E80',
    700: '#333B5C',
    800: '#24293C',
    900: '#181B25',
  },
}

$base: #667BCC;
$base-ink: #141310;
$base-50: #F3F5FC;
$base-100: #E0E4F5;
$base-200: #C2CAEB;
$base-300: #97A4D8;
$base-400: #7080C2;
$base-500: #4E60A6;
$base-600: #424E80;
$base-700: #333B5C;
$base-800: #24293C;
$base-900: #181B25;
$base-hover: #3D56B8;
$base-subtle: #D5D9EC;

{
    "color": {
        "base": {
            "value": "#667BCC",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F5FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E4F5",
                "type": "color"
            },
            "200": {
                "value": "#C2CAEB",
                "type": "color"
            },
            "300": {
                "value": "#97A4D8",
                "type": "color"
            },
            "400": {
                "value": "#7080C2",
                "type": "color"
            },
            "500": {
                "value": "#4E60A6",
                "type": "color"
            },
            "600": {
                "value": "#424E80",
                "type": "color"
            },
            "700": {
                "value": "#333B5C",
                "type": "color"
            },
            "800": {
                "value": "#24293C",
                "type": "color"
            },
            "900": {
                "value": "#181B25",
                "type": "color"
            }
        }
    }
}

Palettes built on #667BCC

Color Lab

Pairs with #667BCC

UI roles & guardrails

In real applications

Scales

Every model

Export