What color is #2A3DEF?

#2A3DEF is a medium, vivid blue. In RGB it is rgb(42, 61, 239), and in HSL hsl(234, 86%, 55%).

Is #2A3DEF accessible as text?

On white, #2A3DEF has a contrast ratio of 6.97:1 (passes WCAG AA for body text); on black it is 3.01:1 (fails). For text placed on #2A3DEF, use white for the best readability.

What is the closest Tailwind color to #2A3DEF?

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

What colors go well with #2A3DEF?

#2A3DEF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #EFDB2A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2A3DEF below.

Is #2A3DEF good for buttons?

#2A3DEF works well for buttons and highlights, but use white text on #2A3DEF — black text only reaches 3.01:1, below the 4.5:1 needed for normal-size labels.

Is #2A3DEF the same as CSS blue?

No — #2A3DEF is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#2A3DEF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2A3DEF

Not just a swatch — here's how #2A3DEF works with other colors. Named schemes with #2A3DEF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #2A3DEF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #496FFF

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 #2A3DEF 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 #2A3DEF 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 #2A3DEF Secondary #7187C0 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 #2A3DEF 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 #2A3DEF 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 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 57/100

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 5/100

Very low

Clean and current — no dusty, aged cast.

Luxury 48/100

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 55/100

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 55/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #2A3DEF

For UI

For branding

For interior

For fashion

People also use #2A3DEF with

Deep Sky 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 7.0:1. Use

Subtle surface Use #DADDF6 for cards and hover fills. Tint 80

Avoid beside #582AEF — 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 #2A3DEF 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: #2A3DEF;
  --color-base-rgb: 42 61 239;
  --color-base-oklch: oklch(48.8% 0.259 268.1);
  --color-50: #F0F2FE;
  --color-100: #D8DCFD;
  --color-200: #B3BAF9;
  --color-300: #808BEF;
  --color-400: #5260E0;
  --color-500: #2F3EC6;
  --color-600: #2B3696;
  --color-700: #252C6A;
  --color-800: #1C2045;
  --color-900: #13152A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  neon-blue: {
    50: '#F0F2FE',
    100: '#D8DCFD',
    200: '#B3BAF9',
    300: '#808BEF',
    400: '#5260E0',
    500: '#2F3EC6',
    600: '#2B3696',
    700: '#252C6A',
    800: '#1C2045',
    900: '#13152A',
  },
}

$base: #2A3DEF;
$base-ink: #FFFFFF;
$base-50: #F0F2FE;
$base-100: #D8DCFD;
$base-200: #B3BAF9;
$base-300: #808BEF;
$base-400: #5260E0;
$base-500: #2F3EC6;
$base-600: #2B3696;
$base-700: #252C6A;
$base-800: #1C2045;
$base-900: #13152A;
$base-hover: #1023D1;
$base-subtle: #C6CBF3;

{
    "color": {
        "base": {
            "value": "#2A3DEF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F2FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DCFD",
                "type": "color"
            },
            "200": {
                "value": "#B3BAF9",
                "type": "color"
            },
            "300": {
                "value": "#808BEF",
                "type": "color"
            },
            "400": {
                "value": "#5260E0",
                "type": "color"
            },
            "500": {
                "value": "#2F3EC6",
                "type": "color"
            },
            "600": {
                "value": "#2B3696",
                "type": "color"
            },
            "700": {
                "value": "#252C6A",
                "type": "color"
            },
            "800": {
                "value": "#1C2045",
                "type": "color"
            },
            "900": {
                "value": "#13152A",
                "type": "color"
            }
        }
    }
}

Palettes built on #2A3DEF

Color Lab

Pairs with #2A3DEF

UI roles & guardrails

In real applications

Scales

Every model

Export