What color is #4359B2?

#4359B2 is a medium blue. In RGB it is rgb(67, 89, 178), and in HSL hsl(228, 45%, 48%).

Is #4359B2 accessible as text?

On white, #4359B2 has a contrast ratio of 6.34:1 (passes WCAG AA for body text); on black it is 3.31:1 (fails). For text placed on #4359B2, use white for the best readability.

What is the closest Tailwind color to #4359B2?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #4359B2?

#4359B2 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B19B43. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #4359B2 below.

Is #4359B2 good for buttons?

#4359B2 works well for buttons and highlights, but use white text on #4359B2 — black text only reaches 3.31:1, below the 4.5:1 needed for normal-size labels.

Is #4359B2 the same as CSS slateblue?

No — #4359B2 is not the CSS named color slateblue, but slateblue (#6A5ACD) is the closest CSS named color.

#4359B2 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #4359B2

Not just a swatch — here's how #4359B2 works with other colors. Named schemes with #4359B2 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #4359B2 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.

Tech Product Signal · 5 colors

Signal #4359B2 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #677FD2

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.

Vintage Leather Lead · 5 colors

Lead #4359B2 Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #582239

Cerulean 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 #4359B2 Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 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 #4359B2 Secondary #7E8AAA 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.

Build a working theme in the generator →

Color Lab

How #4359B2 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 17/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 52/100

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 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 56/100

Moderate

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 39/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 98/100

Very high

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

Surface fit 9/100

Very low

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

Print safety 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #4359B2

For UI

For branding

For interior

For fashion

People also use #4359B2 with

Iceberg Grape Brass Gainsboro Gunmetal Gray

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 6.3:1. Use

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

Avoid beside #5243B1 — 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 #4359B2 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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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: #4359B2;
  --color-base-rgb: 67 89 178;
  --color-base-oklch: oklch(49.4% 0.143 270.0);
  --color-50: #F4F5FB;
  --color-100: #E1E5F4;
  --color-200: #C4CBE8;
  --color-300: #9BA6D5;
  --color-400: #7483BE;
  --color-500: #5363A2;
  --color-600: #45507D;
  --color-700: #353D5A;
  --color-800: #262A3B;
  --color-900: #191B25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F4F5FB',
    100: '#E1E5F4',
    200: '#C4CBE8',
    300: '#9BA6D5',
    400: '#7483BE',
    500: '#5363A2',
    600: '#45507D',
    700: '#353D5A',
    800: '#262A3B',
    900: '#191B25',
  },
}

$base: #4359B2;
$base-ink: #FFFFFF;
$base-50: #F4F5FB;
$base-100: #E1E5F4;
$base-200: #C4CBE8;
$base-300: #9BA6D5;
$base-400: #7483BE;
$base-500: #5363A2;
$base-600: #45507D;
$base-700: #353D5A;
$base-800: #262A3B;
$base-900: #191B25;
$base-hover: #36478E;
$base-subtle: #CACFE5;

{
    "color": {
        "base": {
            "value": "#4359B2",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F5FB",
                "type": "color"
            },
            "100": {
                "value": "#E1E5F4",
                "type": "color"
            },
            "200": {
                "value": "#C4CBE8",
                "type": "color"
            },
            "300": {
                "value": "#9BA6D5",
                "type": "color"
            },
            "400": {
                "value": "#7483BE",
                "type": "color"
            },
            "500": {
                "value": "#5363A2",
                "type": "color"
            },
            "600": {
                "value": "#45507D",
                "type": "color"
            },
            "700": {
                "value": "#353D5A",
                "type": "color"
            },
            "800": {
                "value": "#262A3B",
                "type": "color"
            },
            "900": {
                "value": "#191B25",
                "type": "color"
            }
        }
    }
}

Palettes built on #4359B2

Color Lab

Pairs with #4359B2

UI roles & guardrails

In real applications

Scales

Every model

Export