What color is #045B79?

#045B79 is a dark, vivid cyan. In RGB it is rgb(4, 91, 121), and in HSL hsl(195, 94%, 25%).

Is #045B79 accessible as text?

On white, #045B79 has a contrast ratio of 7.56:1 (passes WCAG AA for body text); on black it is 2.78:1 (fails). For text placed on #045B79, use white for the best readability.

What is the closest Tailwind color to #045B79?

The nearest Tailwind CSS token is cyan-800 (#005F78).

What colors go well with #045B79?

#045B79 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7C2204. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #045B79 below.

Is #045B79 good for buttons?

#045B79 works well for buttons and highlights, but use white text on #045B79 — black text only reaches 2.78:1, below the 4.5:1 needed for normal-size labels.

Is #045B79 the same as CSS darkslategray?

No — #045B79 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#045B79 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #045B79

Not just a swatch — here's how #045B79 works with other colors. Named schemes with #045B79 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #045B79 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Classic Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #045B79 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Classic Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #045B79 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #3F7D9A

Classic 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 Classic Blue.

Vintage Leather Lead · 5 colors

Lead #045B79 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Classic 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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #045B79 Secondary #697E89 Support #969386 Ink #16140F

Classic 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #045B79 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 24/100

Cool

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 55/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 50/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 61/100

High

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

Brand distinctiveness 23/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 77/100

High

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

Surface fit 30/100

Low

Usable as a tinted surface in measured doses.

Print safety 78/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #045B79

For UI

For branding

For interior

For fashion

People also use #045B79 with

Jade Green Phthalo Blue Wine Red Platinum Dark Slate Gray

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 7.6:1. Use

Subtle surface Use #BFE6F3 for cards and hover fills. Tint 80

Avoid beside #04367C — 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 #045B79 at work across the surfaces designers actually ship.

Website / UI

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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: #045B79;
  --color-base-rgb: 4 91 121;
  --color-base-oklch: oklch(44.1% 0.086 229.7);
  --color-50: #F0FBFE;
  --color-100: #D8F4FD;
  --color-200: #B1E9FC;
  --color-300: #7BD6F4;
  --color-400: #4BC0E7;
  --color-500: #28A4CD;
  --color-600: #267E9B;
  --color-700: #215A6D;
  --color-800: #1A3C47;
  --color-900: #12252B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F0FBFE',
    100: '#D8F4FD',
    200: '#B1E9FC',
    300: '#7BD6F4',
    400: '#4BC0E7',
    500: '#28A4CD',
    600: '#267E9B',
    700: '#215A6D',
    800: '#1A3C47',
    900: '#12252B',
  },
}

$base: #045B79;
$base-ink: #FFFFFF;
$base-50: #F0FBFE;
$base-100: #D8F4FD;
$base-200: #B1E9FC;
$base-300: #7BD6F4;
$base-400: #4BC0E7;
$base-500: #28A4CD;
$base-600: #267E9B;
$base-700: #215A6D;
$base-800: #1A3C47;
$base-900: #12252B;
$base-hover: #034B63;
$base-subtle: #9DDAEF;

{
    "color": {
        "base": {
            "value": "#045B79",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FBFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F4FD",
                "type": "color"
            },
            "200": {
                "value": "#B1E9FC",
                "type": "color"
            },
            "300": {
                "value": "#7BD6F4",
                "type": "color"
            },
            "400": {
                "value": "#4BC0E7",
                "type": "color"
            },
            "500": {
                "value": "#28A4CD",
                "type": "color"
            },
            "600": {
                "value": "#267E9B",
                "type": "color"
            },
            "700": {
                "value": "#215A6D",
                "type": "color"
            },
            "800": {
                "value": "#1A3C47",
                "type": "color"
            },
            "900": {
                "value": "#12252B",
                "type": "color"
            }
        }
    }
}

Palettes built on #045B79

Color Lab

Pairs with #045B79

UI roles & guardrails

In real applications

Scales

Every model

Export