What color is #342DF9?

#342DF9 is a medium, vivid blue. In RGB it is rgb(52, 45, 249), and in HSL hsl(242, 94%, 58%).

Is #342DF9 accessible as text?

On white, #342DF9 has a contrast ratio of 7.27:1 (passes WCAG AA for body text); on black it is 2.89:1 (fails). For text placed on #342DF9, use white for the best readability.

What is the closest Tailwind color to #342DF9?

The nearest Tailwind CSS token is indigo-600 (#4F39F6).

What colors go well with #342DF9?

#342DF9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F2F92F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #342DF9 below.

Is #342DF9 good for buttons?

#342DF9 works well for buttons and highlights, but use white text on #342DF9 — black text only reaches 2.89:1, below the 4.5:1 needed for normal-size labels.

Is #342DF9 the same as CSS blue?

No — #342DF9 is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#342DF9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #342DF9

Not just a swatch — here's how #342DF9 works with other colors. Named schemes with #342DF9 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #342DF9 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4F67FF

Ultramarine is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Ultramarine.

Coastal Morning Lead · 5 colors

Lead #342DF9 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Ultramarine 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 #342DF9 Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Ultramarine 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 #342DF9 Secondary #7184C3 Support #9D8F88 Ink #18140F

Ultramarine 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 Ultramarine carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #342DF9 Secondary #E86A73 Accent #F69250 Anchor #573B58 Surface #F7E7D7

Ultramarine 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 #342DF9 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 12/100

Cool

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

Softness 22/100

Low

Firm and assertive — carries weight and contrast.

Depth 58/100

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 0/100

Very low

Clean and current — no dusty, aged cast.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 100/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 44/100

Moderate

Workable accent with care around contrast.

Surface fit 8/100

Very low

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

Print safety 52/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #342DF9

For UI

For branding

For interior

For fashion

People also use #342DF9 with

Picton Blue Electric Purple Pear Gainsboro Prussian Blue

UI roles & guardrails

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

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 7.3:1. Use

Subtle surface Use #DCDBF8 for cards and hover fills. Tint 80

Avoid beside #792FF9 — 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 #342DF9 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: #342DF9;
  --color-base-rgb: 52 45 249;
  --color-base-oklch: oklch(48.5% 0.280 270.5);
  --color-50: #F1F0FE;
  --color-100: #D9D8FD;
  --color-200: #B3B1FC;
  --color-300: #7F7BF4;
  --color-400: #504BE7;
  --color-500: #2D28CD;
  --color-600: #2A269B;
  --color-700: #24216D;
  --color-800: #1B1A47;
  --color-900: #13122B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultramarine: {
    50: '#F1F0FE',
    100: '#D9D8FD',
    200: '#B3B1FC',
    300: '#7F7BF4',
    400: '#504BE7',
    500: '#2D28CD',
    600: '#2A269B',
    700: '#24216D',
    800: '#1B1A47',
    900: '#13122B',
  },
}

$base: #342DF9;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #D9D8FD;
$base-200: #B3B1FC;
$base-300: #7F7BF4;
$base-400: #504BE7;
$base-500: #2D28CD;
$base-600: #2A269B;
$base-700: #24216D;
$base-800: #1B1A47;
$base-900: #13122B;
$base-hover: #0F07E6;
$base-subtle: #C9C8F6;

{
    "color": {
        "base": {
            "value": "#342DF9",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D9D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B3B1FC",
                "type": "color"
            },
            "300": {
                "value": "#7F7BF4",
                "type": "color"
            },
            "400": {
                "value": "#504BE7",
                "type": "color"
            },
            "500": {
                "value": "#2D28CD",
                "type": "color"
            },
            "600": {
                "value": "#2A269B",
                "type": "color"
            },
            "700": {
                "value": "#24216D",
                "type": "color"
            },
            "800": {
                "value": "#1B1A47",
                "type": "color"
            },
            "900": {
                "value": "#13122B",
                "type": "color"
            }
        }
    }
}

Palettes built on #342DF9

Color Lab

Pairs with #342DF9

UI roles & guardrails

In real applications

Scales

Every model

Export