What color is #3178C9?

#3178C9 is a medium blue. In RGB it is rgb(49, 120, 201), and in HSL hsl(212, 61%, 49%).

Is #3178C9 accessible as text?

On white, #3178C9 has a contrast ratio of 4.51:1 (passes WCAG AA for body text); on black it is 4.66:1 (passes). For text placed on #3178C9, use black for the best readability.

What is the closest Tailwind color to #3178C9?

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

What colors go well with #3178C9?

#3178C9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C98231. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3178C9 below.

Is #3178C9 good for buttons?

#3178C9 works for buttons; black text has the higher contrast, so prefer it for labels.

Is #3178C9 the same as CSS steelblue?

No — #3178C9 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#3178C9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3178C9

Not just a swatch — here's how #3178C9 works with other colors. Named schemes with #3178C9 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3178C9 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

True Blue 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 #3178C9 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5F9EE9

True 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 True Blue.

Vintage Leather Lead · 5 colors

Lead #3178C9 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

True Blue 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 #3178C9 Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #3178C9 Secondary #8CA3C1 Support #9D8F89 Ink #16140F

True 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 True Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3178C9 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 11/100

Cool

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 44/100

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 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 39/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 97/100

Very high

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

Surface fit 15/100

Very low

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

Print safety 70/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3178C9

For UI

For branding

For interior

For fashion

People also use #3178C9 with

Medium Turquoise Cerulean Bronze Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 4.5:1. Use

Subtle surface Use #DAE4F0 for cards and hover fills. Tint 80

Avoid beside #3145C9 — 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 #3178C9 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #3178C9;
  --color-base-rgb: 49 120 201;
  --color-base-oklch: oklch(56.9% 0.144 254.1);
  --color-50: #F2F7FC;
  --color-100: #DDEAF8;
  --color-200: #BDD5EF;
  --color-300: #90B5DF;
  --color-400: #6796CB;
  --color-500: #4577B0;
  --color-600: #3B5E87;
  --color-700: #2F4660;
  --color-800: #222F3F;
  --color-900: #161E27;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F2F7FC',
    100: '#DDEAF8',
    200: '#BDD5EF',
    300: '#90B5DF',
    400: '#6796CB',
    500: '#4577B0',
    600: '#3B5E87',
    700: '#2F4660',
    800: '#222F3F',
    900: '#161E27',
  },
}

$base: #3178C9;
$base-ink: #141310;
$base-50: #F2F7FC;
$base-100: #DDEAF8;
$base-200: #BDD5EF;
$base-300: #90B5DF;
$base-400: #6796CB;
$base-500: #4577B0;
$base-600: #3B5E87;
$base-700: #2F4660;
$base-800: #222F3F;
$base-900: #161E27;
$base-hover: #2760A1;
$base-subtle: #C6D7EA;

{
    "color": {
        "base": {
            "value": "#3178C9",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F7FC",
                "type": "color"
            },
            "100": {
                "value": "#DDEAF8",
                "type": "color"
            },
            "200": {
                "value": "#BDD5EF",
                "type": "color"
            },
            "300": {
                "value": "#90B5DF",
                "type": "color"
            },
            "400": {
                "value": "#6796CB",
                "type": "color"
            },
            "500": {
                "value": "#4577B0",
                "type": "color"
            },
            "600": {
                "value": "#3B5E87",
                "type": "color"
            },
            "700": {
                "value": "#2F4660",
                "type": "color"
            },
            "800": {
                "value": "#222F3F",
                "type": "color"
            },
            "900": {
                "value": "#161E27",
                "type": "color"
            }
        }
    }
}

Palettes built on #3178C9

Color Lab

Pairs with #3178C9

UI roles & guardrails

In real applications

Scales

Every model

Export