What color is #345CCB?

#345CCB is a medium blue. In RGB it is rgb(52, 92, 203), and in HSL hsl(224, 59%, 50%).

Is #345CCB accessible as text?

On white, #345CCB has a contrast ratio of 5.93:1 (passes WCAG AA for body text); on black it is 3.54:1 (fails). For text placed on #345CCB, use white for the best readability.

What is the closest Tailwind color to #345CCB?

The nearest Tailwind CSS token is blue-700 (#1447E6).

What colors go well with #345CCB?

#345CCB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CBA334. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #345CCB below.

Is #345CCB good for buttons?

#345CCB works well for buttons and highlights, but use white text on #345CCB — black text only reaches 3.54:1, below the 4.5:1 needed for normal-size labels.

Is #345CCB the same as CSS royalblue?

No — #345CCB is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#345CCB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #345CCB

Not just a swatch — here's how #345CCB works with other colors. Named schemes with #345CCB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #345CCB Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Denim 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 #345CCB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5A84EA

Denim 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 Denim Blue.

Vintage Leather Lead · 5 colors

Lead #345CCB Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

Denim 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 #345CCB Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #345CCB Secondary #7D8FB7 Support #9D8F88 Ink #18140F

Denim 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 Denim Blue carrying the quiet middle.

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Color Lab

How #345CCB 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 9/100

Cool

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 52/100

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 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 94/100

Very high

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

Surface fit 9/100

Very low

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

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #345CCB

For UI

For branding

For interior

For fashion

People also use #345CCB with

Lagoon Blue Grape Goldenrod 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 5.9:1. Use

Subtle surface Use #DBE0F0 for cards and hover fills. Tint 80

Avoid beside #3E34CB — 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 #345CCB 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: #345CCB;
  --color-base-rgb: 52 92 203;
  --color-base-oklch: oklch(51.2% 0.178 265.5);
  --color-50: #F2F5FC;
  --color-100: #DEE5F7;
  --color-200: #BECBEE;
  --color-300: #92A6DE;
  --color-400: #6882CA;
  --color-500: #4662AE;
  --color-600: #3C5086;
  --color-700: #303C5F;
  --color-800: #222A3F;
  --color-900: #171B27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  denim-blue: {
    50: '#F2F5FC',
    100: '#DEE5F7',
    200: '#BECBEE',
    300: '#92A6DE',
    400: '#6882CA',
    500: '#4662AE',
    600: '#3C5086',
    700: '#303C5F',
    800: '#222A3F',
    900: '#171B27',
  },
}

$base: #345CCB;
$base-ink: #FFFFFF;
$base-50: #F2F5FC;
$base-100: #DEE5F7;
$base-200: #BECBEE;
$base-300: #92A6DE;
$base-400: #6882CA;
$base-500: #4662AE;
$base-600: #3C5086;
$base-700: #303C5F;
$base-800: #222A3F;
$base-900: #171B27;
$base-hover: #2A4AA2;
$base-subtle: #C8D1EA;

{
    "color": {
        "base": {
            "value": "#345CCB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F5FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE5F7",
                "type": "color"
            },
            "200": {
                "value": "#BECBEE",
                "type": "color"
            },
            "300": {
                "value": "#92A6DE",
                "type": "color"
            },
            "400": {
                "value": "#6882CA",
                "type": "color"
            },
            "500": {
                "value": "#4662AE",
                "type": "color"
            },
            "600": {
                "value": "#3C5086",
                "type": "color"
            },
            "700": {
                "value": "#303C5F",
                "type": "color"
            },
            "800": {
                "value": "#222A3F",
                "type": "color"
            },
            "900": {
                "value": "#171B27",
                "type": "color"
            }
        }
    }
}

Palettes built on #345CCB

Color Lab

Pairs with #345CCB

UI roles & guardrails

In real applications

Scales

Every model

Export