What color is #667FA4?

#667FA4 is a medium, muted blue. In RGB it is rgb(102, 127, 164), and in HSL hsl(216, 25%, 52%).

Is #667FA4 accessible as text?

On white, #667FA4 has a contrast ratio of 4.09:1 (fails WCAG AA for body text); on black it is 5.14:1 (passes). For text placed on #667FA4, use black for the best readability.

What is the closest Tailwind color to #667FA4?

The nearest Tailwind CSS token is mist-500 (#67787C).

What colors go well with #667FA4?

#667FA4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A38B66. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #667FA4 below.

Is #667FA4 good for buttons?

#667FA4 works well for buttons and highlights, but use black text on #667FA4 — white text only reaches 4.09:1, below the 4.5:1 needed for normal-size labels.

Is #667FA4 the same as CSS slategray?

No — #667FA4 is not the CSS named color slategray, but slategray (#708090) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#667FA4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #667FA4

Not just a swatch — here's how #667FA4 works with other colors. Named schemes with #667FA4 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #667FA4 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Glaucous 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 #667FA4 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Glaucous 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 #667FA4 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #8CA3C6

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 #667FA4 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223B

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #667FA4 Secondary #A0A9B7 Support #9D8F89 Ink #16140F

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 #667FA4 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 54/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 40/100

Low

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 51/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 46/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 25/100

Low

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

UI accent fit 74/100

High

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

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #667FA4

For UI

For branding

For interior

For fashion

People also use #667FA4 with

Cadet Grey Very Peri Beaver 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 Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.5:1. Use

Subtle surface Use #E2E6EB for cards and hover fills. Tint 80

Avoid beside #666AA3 — 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 #667FA4 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: #667FA4;
  --color-base-rgb: 102 127 164;
  --color-base-oklch: oklch(59.1% 0.064 258.0);
  --color-50: #F5F7F9;
  --color-100: #E5EAF0;
  --color-200: #CCD4E0;
  --color-300: #A7B4C8;
  --color-400: #8495AE;
  --color-500: #647690;
  --color-600: #515E70;
  --color-700: #3D4551;
  --color-800: #2A2F36;
  --color-900: #1B1E22;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F5F7F9',
    100: '#E5EAF0',
    200: '#CCD4E0',
    300: '#A7B4C8',
    400: '#8495AE',
    500: '#647690',
    600: '#515E70',
    700: '#3D4551',
    800: '#2A2F36',
    900: '#1B1E22',
  },
}

$base: #667FA4;
$base-ink: #141310;
$base-50: #F5F7F9;
$base-100: #E5EAF0;
$base-200: #CCD4E0;
$base-300: #A7B4C8;
$base-400: #8495AE;
$base-500: #647690;
$base-600: #515E70;
$base-700: #3D4551;
$base-800: #2A2F36;
$base-900: #1B1E22;
$base-hover: #506585;
$base-subtle: #D3D9E1;

{
    "color": {
        "base": {
            "value": "#667FA4",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E5EAF0",
                "type": "color"
            },
            "200": {
                "value": "#CCD4E0",
                "type": "color"
            },
            "300": {
                "value": "#A7B4C8",
                "type": "color"
            },
            "400": {
                "value": "#8495AE",
                "type": "color"
            },
            "500": {
                "value": "#647690",
                "type": "color"
            },
            "600": {
                "value": "#515E70",
                "type": "color"
            },
            "700": {
                "value": "#3D4551",
                "type": "color"
            },
            "800": {
                "value": "#2A2F36",
                "type": "color"
            },
            "900": {
                "value": "#1B1E22",
                "type": "color"
            }
        }
    }
}

Palettes built on #667FA4

Color Lab

Pairs with #667FA4

UI roles & guardrails

In real applications

Scales

Every model

Export