What color is #3349EF?

#3349EF is a medium, vivid blue. In RGB it is rgb(51, 73, 239), and in HSL hsl(233, 85%, 57%).

Is #3349EF accessible as text?

On white, #3349EF has a contrast ratio of 6.29:1 (passes WCAG AA for body text); on black it is 3.34:1 (fails). For text placed on #3349EF, use white for the best readability.

What is the closest Tailwind color to #3349EF?

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

What colors go well with #3349EF?

#3349EF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EFD934. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3349EF below.

Is #3349EF good for buttons?

#3349EF works well for buttons and highlights, but use white text on #3349EF — black text only reaches 3.34:1, below the 4.5:1 needed for normal-size labels.

Is #3349EF the same as CSS royalblue?

No — #3349EF is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#3349EF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3349EF

Not just a swatch — here's how #3349EF works with other colors. Named schemes with #3349EF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3349EF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5478FF

Neon 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 Neon Blue.

Coastal Morning Lead · 5 colors

Lead #3349EF Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Neon Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Berry & Cream Lead · 5 colors

Lead #3349EF Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA Secondary #322B2F

Neon 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 #3349EF Secondary #798DC4 Support #9D8F88 Ink #18140F

Neon 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 Neon Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #3349EF Secondary #E86A74 Accent #F69250 Anchor #573B58 Surface #F7E7D7

Neon Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #3349EF 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 27/100

Low

Firm and assertive — carries weight and contrast.

Depth 54/100

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 9/100

Very low

Clean and current — no dusty, aged cast.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 95/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 63/100

High

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

Surface fit 8/100

Very low

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

Print safety 57/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #3349EF

For UI

For branding

For interior

For fashion

People also use #3349EF with

Maya Blue Blue Violet Citrine Gainsboro Prussian Blue

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 6.3:1. Use

Subtle surface Use #DCDFF6 for cards and hover fills. Tint 80

Avoid beside #5D34EF — 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 #3349EF 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: #3349EF;
  --color-base-rgb: 51 73 239;
  --color-base-oklch: oklch(50.9% 0.246 268.9);
  --color-50: #F0F2FE;
  --color-100: #D8DDFD;
  --color-200: #B4BCF9;
  --color-300: #818EEE;
  --color-400: #5363DF;
  --color-500: #3041C5;
  --color-600: #2C3896;
  --color-700: #252D6A;
  --color-800: #1C2145;
  --color-900: #13162A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  neon-blue: {
    50: '#F0F2FE',
    100: '#D8DDFD',
    200: '#B4BCF9',
    300: '#818EEE',
    400: '#5363DF',
    500: '#3041C5',
    600: '#2C3896',
    700: '#252D6A',
    800: '#1C2145',
    900: '#13162A',
  },
}

$base: #3349EF;
$base-ink: #FFFFFF;
$base-50: #F0F2FE;
$base-100: #D8DDFD;
$base-200: #B4BCF9;
$base-300: #818EEE;
$base-400: #5363DF;
$base-500: #3041C5;
$base-600: #2C3896;
$base-700: #252D6A;
$base-800: #1C2145;
$base-900: #13162A;
$base-hover: #1129D7;
$base-subtle: #C9CEF3;

{
    "color": {
        "base": {
            "value": "#3349EF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F2FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DDFD",
                "type": "color"
            },
            "200": {
                "value": "#B4BCF9",
                "type": "color"
            },
            "300": {
                "value": "#818EEE",
                "type": "color"
            },
            "400": {
                "value": "#5363DF",
                "type": "color"
            },
            "500": {
                "value": "#3041C5",
                "type": "color"
            },
            "600": {
                "value": "#2C3896",
                "type": "color"
            },
            "700": {
                "value": "#252D6A",
                "type": "color"
            },
            "800": {
                "value": "#1C2145",
                "type": "color"
            },
            "900": {
                "value": "#13162A",
                "type": "color"
            }
        }
    }
}

Palettes built on #3349EF

Color Lab

Pairs with #3349EF

UI roles & guardrails

In real applications

Scales

Every model

Export