What color is #218FCB?

#218FCB is a medium, vivid cyan-blue. In RGB it is rgb(33, 143, 203), and in HSL hsl(201, 72%, 46%).

Is #218FCB accessible as text?

On white, #218FCB has a contrast ratio of 3.59:1 (fails WCAG AA for body text); on black it is 5.86:1 (passes). For text placed on #218FCB, use black for the best readability.

What is the closest Tailwind color to #218FCB?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #218FCB?

#218FCB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CA5C21. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #218FCB below.

Is #218FCB good for buttons?

#218FCB works well for buttons and highlights, but use black text on #218FCB — white text only reaches 3.59:1, below the 4.5:1 needed for normal-size labels.

Is #218FCB the same as CSS steelblue?

No — #218FCB is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#218FCB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #218FCB

Not just a swatch — here's how #218FCB works with other colors. Named schemes with #218FCB in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #218FCB Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Ocean 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 #218FCB Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5DB4EC

Ocean 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 Ocean Blue.

Vintage Leather Lead · 5 colors

Lead #218FCB Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

Ocean 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 #218FCB Surface #EEE9D6 Anchor #592246 Accent #E4C2CC Secondary #322B30

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #218FCB Secondary #97B6CB Support #969386 Ink #16140F

Ocean 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 Ocean Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #218FCB 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 48/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 45/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 35/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 87/100

Very high

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

Surface fit 24/100

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 #218FCB

For UI

For branding

For interior

For fashion

People also use #218FCB with

Turquoise Medium Blue Tawny Platinum Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 5.2:1. Use

Subtle surface Use #D5E8F2 for cards and hover fills. Tint 80

Avoid beside #2156CA — 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 #218FCB 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: #218FCB;
  --color-base-rgb: 33 143 203;
  --color-base-oklch: oklch(61.9% 0.130 239.1);
  --color-50: #F1F9FD;
  --color-100: #DBEFFA;
  --color-200: #B9DFF3;
  --color-300: #89C6E6;
  --color-400: #5DABD5;
  --color-500: #3B8DBA;
  --color-600: #346E8E;
  --color-700: #2A5064;
  --color-800: #1F3642;
  --color-900: #152228;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  ocean-blue: {
    50: '#F1F9FD',
    100: '#DBEFFA',
    200: '#B9DFF3',
    300: '#89C6E6',
    400: '#5DABD5',
    500: '#3B8DBA',
    600: '#346E8E',
    700: '#2A5064',
    800: '#1F3642',
    900: '#152228',
  },
}

$base: #218FCB;
$base-ink: #141310;
$base-50: #F1F9FD;
$base-100: #DBEFFA;
$base-200: #B9DFF3;
$base-300: #89C6E6;
$base-400: #5DABD5;
$base-500: #3B8DBA;
$base-600: #346E8E;
$base-700: #2A5064;
$base-800: #1F3642;
$base-900: #152228;
$base-hover: #1A72A1;
$base-subtle: #BFDCEC;

{
    "color": {
        "base": {
            "value": "#218FCB",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F9FD",
                "type": "color"
            },
            "100": {
                "value": "#DBEFFA",
                "type": "color"
            },
            "200": {
                "value": "#B9DFF3",
                "type": "color"
            },
            "300": {
                "value": "#89C6E6",
                "type": "color"
            },
            "400": {
                "value": "#5DABD5",
                "type": "color"
            },
            "500": {
                "value": "#3B8DBA",
                "type": "color"
            },
            "600": {
                "value": "#346E8E",
                "type": "color"
            },
            "700": {
                "value": "#2A5064",
                "type": "color"
            },
            "800": {
                "value": "#1F3642",
                "type": "color"
            },
            "900": {
                "value": "#152228",
                "type": "color"
            }
        }
    }
}

Palettes built on #218FCB

Color Lab

Pairs with #218FCB

UI roles & guardrails

In real applications

Scales

Every model

Export