What color is #213CD5?

#213CD5 is a medium, vivid blue. In RGB it is rgb(33, 60, 213), and in HSL hsl(231, 73%, 48%).

Is #213CD5 accessible as text?

On white, #213CD5 has a contrast ratio of 7.86:1 (passes WCAG AA for body text); on black it is 2.67:1 (fails). For text placed on #213CD5, use white for the best readability.

What is the closest Tailwind color to #213CD5?

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

What colors go well with #213CD5?

#213CD5 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D4B921. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #213CD5 below.

Is #213CD5 good for buttons?

#213CD5 works well for buttons and highlights, but use white text on #213CD5 — black text only reaches 2.67:1, below the 4.5:1 needed for normal-size labels.

Is #213CD5 the same as CSS mediumblue?

No — #213CD5 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#213CD5 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #213CD5

Not just a swatch — here's how #213CD5 works with other colors. Named schemes with #213CD5 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #213CD5 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #426AF2

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

Coastal Morning Lead · 5 colors

Lead #213CD5 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Cerulean 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 #213CD5 Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA Secondary #322B2F

Cerulean 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 #213CD5 Secondary #697EB0 Support #9D8F88 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #213CD5 Secondary #E86A74 Accent #F79250 Anchor #573B58 Surface #F7E7D7

Cerulean 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 #213CD5 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 10/100

Cool

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

Softness 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 60/100

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 12/100

Very low

Clean and current — no dusty, aged cast.

Luxury 52/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 90/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 65/100

High

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

Surface fit 10/100

Very low

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

Print safety 59/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #213CD5

For UI

For branding

For interior

For fashion

People also use #213CD5 with

Picton Blue Blue Violet Mustard Yellow 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 7.9:1. Use

Subtle surface Use #D7DBF2 for cards and hover fills. Tint 80

Avoid beside #4221D4 — 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 #213CD5 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: #213CD5;
  --color-base-rgb: 33 60 213;
  --color-base-oklch: oklch(45.6% 0.232 267.0);
  --color-50: #F1F3FD;
  --color-100: #DBE0FA;
  --color-200: #B9C1F4;
  --color-300: #8897E7;
  --color-400: #5D6FD5;
  --color-500: #3A4DBB;
  --color-600: #33418E;
  --color-700: #2A3365;
  --color-800: #1F2442;
  --color-900: #151828;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F1F3FD',
    100: '#DBE0FA',
    200: '#B9C1F4',
    300: '#8897E7',
    400: '#5D6FD5',
    500: '#3A4DBB',
    600: '#33418E',
    700: '#2A3365',
    800: '#1F2442',
    900: '#151828',
  },
}

$base: #213CD5;
$base-ink: #FFFFFF;
$base-50: #F1F3FD;
$base-100: #DBE0FA;
$base-200: #B9C1F4;
$base-300: #8897E7;
$base-400: #5D6FD5;
$base-500: #3A4DBB;
$base-600: #33418E;
$base-700: #2A3365;
$base-800: #1F2442;
$base-900: #151828;
$base-hover: #1A30A9;
$base-subtle: #C1C8ED;

{
    "color": {
        "base": {
            "value": "#213CD5",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F3FD",
                "type": "color"
            },
            "100": {
                "value": "#DBE0FA",
                "type": "color"
            },
            "200": {
                "value": "#B9C1F4",
                "type": "color"
            },
            "300": {
                "value": "#8897E7",
                "type": "color"
            },
            "400": {
                "value": "#5D6FD5",
                "type": "color"
            },
            "500": {
                "value": "#3A4DBB",
                "type": "color"
            },
            "600": {
                "value": "#33418E",
                "type": "color"
            },
            "700": {
                "value": "#2A3365",
                "type": "color"
            },
            "800": {
                "value": "#1F2442",
                "type": "color"
            },
            "900": {
                "value": "#151828",
                "type": "color"
            }
        }
    }
}

Palettes built on #213CD5

Color Lab

Pairs with #213CD5

UI roles & guardrails

In real applications

Scales

Every model

Export