What color is #0000FF?

Blue (#0000FF) is a medium, vivid blue. In RGB it is rgb(0, 0, 255), and in HSL hsl(240, 100%, 50%).

Is #0000FF accessible as text?

On white, #0000FF has a contrast ratio of 8.59:1 (passes WCAG AA for body text); on black it is 2.44:1 (fails). For text placed on #0000FF, use white for the best readability.

What is the closest Tailwind color to #0000FF?

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

What colors go well with #0000FF?

#0000FF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FFFF00. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0000FF below.

Is Blue good for buttons?

Blue works well for buttons and highlights, but use white text on #0000FF — black text only reaches 2.44:1, below the 4.5:1 needed for normal-size labels.

Is Blue the same as CSS blue?

Yes — #0000FF is the CSS named color blue.

Blue (#0000FF) Color Palette, HEX, RGB & Design Ideas

Palettes built on Blue

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

Tech Product Signal · 5 colors

Signal #0000FF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #195BFF

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 Blue.

Coastal Morning Lead · 5 colors

Lead #0000FF Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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 #0000FF Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

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 #0000FF Secondary #5C7CBF Support #9D8F88 Ink #18140F

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 Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #0000FF Secondary #E76A75 Accent #F79251 Anchor #573B58 Surface #F7E7D7

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

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Color Lab

How Blue 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 18/100

Very low

Firm and assertive — carries weight and contrast.

Depth 63/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

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 46/100

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 27/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 11/100

Very low

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

Print safety 42/100

Moderate

Shifts noticeably in CMYK — expect it to dull on press.

Pairs with Blue

For UI

For branding

For interior

For fashion

People also use Blue with

Dodger Blue Violet 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 8.6:1. Use

Subtle surface Use #D3D3F8 for cards and hover fills. Tint 80

Avoid beside #5500FF — 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 Blue at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

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NIGHT
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Packaging

BLOOM

Botanical Wash

250 ml

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Export

:root {
  --color-base: #0000FF;
  --color-base-rgb: 0 0 255;
  --color-base-oklch: oklch(45.2% 0.313 264.1);
  --color-50: #F0F0FE;
  --color-100: #D8D8FD;
  --color-200: #B1B1FC;
  --color-300: #7777F8;
  --color-400: #4646EC;
  --color-500: #2222D2;
  --color-600: #23239F;
  --color-700: #1F1F70;
  --color-800: #181848;
  --color-900: #11112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  blue: {
    50: '#F0F0FE',
    100: '#D8D8FD',
    200: '#B1B1FC',
    300: '#7777F8',
    400: '#4646EC',
    500: '#2222D2',
    600: '#23239F',
    700: '#1F1F70',
    800: '#181848',
    900: '#11112C',
  },
}

$base: #0000FF;
$base-ink: #FFFFFF;
$base-50: #F0F0FE;
$base-100: #D8D8FD;
$base-200: #B1B1FC;
$base-300: #7777F8;
$base-400: #4646EC;
$base-500: #2222D2;
$base-600: #23239F;
$base-700: #1F1F70;
$base-800: #181848;
$base-900: #11112C;
$base-hover: #0000CC;
$base-subtle: #BCBCF6;

{
    "color": {
        "base": {
            "value": "#0000FF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D8D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B1B1FC",
                "type": "color"
            },
            "300": {
                "value": "#7777F8",
                "type": "color"
            },
            "400": {
                "value": "#4646EC",
                "type": "color"
            },
            "500": {
                "value": "#2222D2",
                "type": "color"
            },
            "600": {
                "value": "#23239F",
                "type": "color"
            },
            "700": {
                "value": "#1F1F70",
                "type": "color"
            },
            "800": {
                "value": "#181848",
                "type": "color"
            },
            "900": {
                "value": "#11112C",
                "type": "color"
            }
        }
    }
}

Palettes built on Blue

Color Lab

Pairs with Blue

UI roles & guardrails

In real applications

Scales

Every model

Export