What color is #347CB7?

#347CB7 is a medium cyan-blue. In RGB it is rgb(52, 124, 183), and in HSL hsl(207, 56%, 46%).

Is #347CB7 accessible as text?

On white, #347CB7 has a contrast ratio of 4.46:1 (fails WCAG AA for body text); on black it is 4.71:1 (passes). For text placed on #347CB7, use black for the best readability.

What is the closest Tailwind color to #347CB7?

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

What colors go well with #347CB7?

#347CB7 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B76F34. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #347CB7 below.

Is #347CB7 good for buttons?

#347CB7 works well for buttons and highlights, but use black text on #347CB7 — white text only reaches 4.46:1, below the 4.5:1 needed for normal-size labels.

Is #347CB7 the same as CSS steelblue?

No — #347CB7 is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#347CB7 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #347CB7

Not just a swatch — here's how #347CB7 works with other colors. Named schemes with #347CB7 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #347CB7 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 #347CB7 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #62A1D8

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 #347CB7 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 #347CB7 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 #347CB7 Secondary #8DA4B9 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 #347CB7 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 17/100

Cool

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

Softness 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 50/100

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 #347CB7

For UI

For branding

For interior

For fashion

People also use #347CB7 with

Medium Turquoise Egyptian Blue Copper 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 white text at 4.5:1. Use

Subtle surface Use #D8E5EF for cards and hover fills. Tint 80

Avoid beside #3450B7 — 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 #347CB7 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: #347CB7;
  --color-base-rgb: 52 124 183;
  --color-base-oklch: oklch(56.9% 0.116 246.6);
  --color-50: #F3F8FC;
  --color-100: #DFECF7;
  --color-200: #BFD8ED;
  --color-300: #93BBDC;
  --color-400: #6B9EC7;
  --color-500: #497FAC;
  --color-600: #3E6484;
  --color-700: #314A5E;
  --color-800: #23323E;
  --color-900: #171F26;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  steel-blue: {
    50: '#F3F8FC',
    100: '#DFECF7',
    200: '#BFD8ED',
    300: '#93BBDC',
    400: '#6B9EC7',
    500: '#497FAC',
    600: '#3E6484',
    700: '#314A5E',
    800: '#23323E',
    900: '#171F26',
  },
}

$base: #347CB7;
$base-ink: #141310;
$base-50: #F3F8FC;
$base-100: #DFECF7;
$base-200: #BFD8ED;
$base-300: #93BBDC;
$base-400: #6B9EC7;
$base-500: #497FAC;
$base-600: #3E6484;
$base-700: #314A5E;
$base-800: #23323E;
$base-900: #171F26;
$base-hover: #296392;
$base-subtle: #C4D7E7;

{
    "color": {
        "base": {
            "value": "#347CB7",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DFECF7",
                "type": "color"
            },
            "200": {
                "value": "#BFD8ED",
                "type": "color"
            },
            "300": {
                "value": "#93BBDC",
                "type": "color"
            },
            "400": {
                "value": "#6B9EC7",
                "type": "color"
            },
            "500": {
                "value": "#497FAC",
                "type": "color"
            },
            "600": {
                "value": "#3E6484",
                "type": "color"
            },
            "700": {
                "value": "#314A5E",
                "type": "color"
            },
            "800": {
                "value": "#23323E",
                "type": "color"
            },
            "900": {
                "value": "#171F26",
                "type": "color"
            }
        }
    }
}

Palettes built on #347CB7

Color Lab

Pairs with #347CB7

UI roles & guardrails

In real applications

Scales

Every model

Export