What color is #347BB4?

#347BB4 is a medium cyan-blue. In RGB it is rgb(52, 123, 180), and in HSL hsl(207, 55%, 45%).

Is #347BB4 accessible as text?

On white, #347BB4 has a contrast ratio of 4.53:1 (passes WCAG AA for body text); on black it is 4.64:1 (passes). For text placed on #347BB4, use black for the best readability.

What is the closest Tailwind color to #347BB4?

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

What colors go well with #347BB4?

#347BB4 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B26C34. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #347BB4 below.

Is #347BB4 good for buttons?

#347BB4 works for buttons; black text has the higher contrast, so prefer it for labels.

Is #347BB4 the same as CSS steelblue?

No — #347BB4 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#347BB4 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #347BB4

Not just a swatch — here's how #347BB4 works with other colors. Named schemes with #347BB4 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #347BB4 Accent #A5C4C0 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Steel 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 #347BB4 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #62A0D5

Steel 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 Steel Blue.

Vintage Leather Lead · 5 colors

Lead #347BB4 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Steel 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 #347BB4 Surface #EDE9D6 Anchor #5A2246 Accent #E4C2CB Secondary #322B2F

Steel 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 #347BB4 Secondary #8CA3B8 Support #969386 Ink #16140F

Steel 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 Steel Blue carrying the quiet middle.

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Color Lab

How #347BB4 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 18/100

Cool

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

Softness 46/100

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 52/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 31/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 95/100

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 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #347BB4

For UI

For branding

For interior

For fashion

People also use #347BB4 with

Robin Egg Blue Egyptian Blue Copper 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 #D8E4EE for cards and hover fills. Tint 80

Avoid beside #344FB2 — 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 #347BB4 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: #347BB4;
  --color-base-rgb: 52 123 180;
  --color-base-oklch: oklch(56.5% 0.113 246.0);
  --color-50: #F3F8FC;
  --color-100: #DFECF6;
  --color-200: #C0D8ED;
  --color-300: #94BBDB;
  --color-400: #6B9EC7;
  --color-500: #4A7FAB;
  --color-600: #3F6483;
  --color-700: #314A5E;
  --color-800: #23323E;
  --color-900: #171F26;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F3F8FC',
    100: '#DFECF6',
    200: '#C0D8ED',
    300: '#94BBDB',
    400: '#6B9EC7',
    500: '#4A7FAB',
    600: '#3F6483',
    700: '#314A5E',
    800: '#23323E',
    900: '#171F26',
  },
}

$base: #347BB4;
$base-ink: #141310;
$base-50: #F3F8FC;
$base-100: #DFECF6;
$base-200: #C0D8ED;
$base-300: #94BBDB;
$base-400: #6B9EC7;
$base-500: #4A7FAB;
$base-600: #3F6483;
$base-700: #314A5E;
$base-800: #23323E;
$base-900: #171F26;
$base-hover: #29618E;
$base-subtle: #C3D7E7;

{
    "color": {
        "base": {
            "value": "#347BB4",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DFECF6",
                "type": "color"
            },
            "200": {
                "value": "#C0D8ED",
                "type": "color"
            },
            "300": {
                "value": "#94BBDB",
                "type": "color"
            },
            "400": {
                "value": "#6B9EC7",
                "type": "color"
            },
            "500": {
                "value": "#4A7FAB",
                "type": "color"
            },
            "600": {
                "value": "#3F6483",
                "type": "color"
            },
            "700": {
                "value": "#314A5E",
                "type": "color"
            },
            "800": {
                "value": "#23323E",
                "type": "color"
            },
            "900": {
                "value": "#171F26",
                "type": "color"
            }
        }
    }
}

Palettes built on #347BB4

Color Lab

Pairs with #347BB4

UI roles & guardrails

In real applications

Scales

Every model

Export