What color is #677CA9?

#677CA9 is a medium, muted blue. In RGB it is rgb(103, 124, 169), and in HSL hsl(221, 28%, 53%).

Is #677CA9 accessible as text?

On white, #677CA9 has a contrast ratio of 4.17:1 (fails WCAG AA for body text); on black it is 5.03:1 (passes). For text placed on #677CA9, use black for the best readability.

What is the closest Tailwind color to #677CA9?

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

What colors go well with #677CA9?

#677CA9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A99366. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #677CA9 below.

Is #677CA9 good for buttons?

#677CA9 works well for buttons and highlights, but use black text on #677CA9 — white text only reaches 4.17:1, below the 4.5:1 needed for normal-size labels.

Is #677CA9 the same as CSS steelblue?

No — #677CA9 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#677CA9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #677CA9

Not just a swatch — here's how #677CA9 works with other colors. Named schemes with #677CA9 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #677CA9 Accent #A5C4C2 Surface #DDDBBF 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.

Nordic Calm Accent · 5 colors

Accent #677CA9 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A7 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 #677CA9 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #8DA1CB

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 #677CA9 Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

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 #F8F4EF Accent #677CA9 Secondary #9FA7B8 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 #677CA9 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 32/100

Cool

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

Softness 53/100

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 55/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 20/100

Very low

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

UI accent fit 79/100

High

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

Surface fit 38/100

Low

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 #677CA9

For UI

For branding

For interior

For fashion

People also use #677CA9 with

Cadet Grey Very Peri Camel Gainsboro Charcoal

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

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 #E2E5EC for cards and hover fills. Tint 80

Avoid beside #6766A9 — 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 #677CA9 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: #677CA9;
  --color-base-rgb: 103 124 169;
  --color-base-oklch: oklch(58.8% 0.074 264.9);
  --color-50: #F5F6FA;
  --color-100: #E5E8F1;
  --color-200: #CBD2E2;
  --color-300: #A6B1CA;
  --color-400: #8291B0;
  --color-500: #627193;
  --color-600: #4F5B72;
  --color-700: #3C4353;
  --color-800: #2A2E37;
  --color-900: #1B1D22;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F5F6FA',
    100: '#E5E8F1',
    200: '#CBD2E2',
    300: '#A6B1CA',
    400: '#8291B0',
    500: '#627193',
    600: '#4F5B72',
    700: '#3C4353',
    800: '#2A2E37',
    900: '#1B1D22',
  },
}

$base: #677CA9;
$base-ink: #141310;
$base-50: #F5F6FA;
$base-100: #E5E8F1;
$base-200: #CBD2E2;
$base-300: #A6B1CA;
$base-400: #8291B0;
$base-500: #627193;
$base-600: #4F5B72;
$base-700: #3C4353;
$base-800: #2A2E37;
$base-900: #1B1D22;
$base-hover: #4E618A;
$base-subtle: #D3D8E3;

{
    "color": {
        "base": {
            "value": "#677CA9",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E5E8F1",
                "type": "color"
            },
            "200": {
                "value": "#CBD2E2",
                "type": "color"
            },
            "300": {
                "value": "#A6B1CA",
                "type": "color"
            },
            "400": {
                "value": "#8291B0",
                "type": "color"
            },
            "500": {
                "value": "#627193",
                "type": "color"
            },
            "600": {
                "value": "#4F5B72",
                "type": "color"
            },
            "700": {
                "value": "#3C4353",
                "type": "color"
            },
            "800": {
                "value": "#2A2E37",
                "type": "color"
            },
            "900": {
                "value": "#1B1D22",
                "type": "color"
            }
        }
    }
}

Palettes built on #677CA9

Color Lab

Pairs with #677CA9

UI roles & guardrails

In real applications

Scales

Every model

Export