What color is #045355?

#045355 is a very dark, vivid cyan. In RGB it is rgb(4, 83, 85), and in HSL hsl(181, 91%, 17%).

Is #045355 accessible as text?

On white, #045355 has a contrast ratio of 8.85:1 (passes WCAG AA for body text); on black it is 2.37:1 (fails). For text placed on #045355, use white for the best readability.

What is the closest Tailwind color to #045355?

The nearest Tailwind CSS token is teal-900 (#0B4F4A).

What colors go well with #045355?

#045355 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #530504. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #045355 below.

Is #045355 good for buttons?

#045355 works well for buttons and highlights, but use white text on #045355 — black text only reaches 2.37:1, below the 4.5:1 needed for normal-size labels.

Is #045355 the same as CSS darkslategray?

No — #045355 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#045355 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #045355

Not just a swatch — here's how #045355 works with other colors. Named schemes with #045355 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #045355 Accent #A6C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1D3549

Dark Slate Gray 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 #045355 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 Anchor #2E3236

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

Vintage Leather Lead · 5 colors

Lead #045355 Secondary #715017 Surface #E3DCC0 Accent #3A5143 Anchor #552340

Dark Slate Gray plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Modern Café Dominant · 5 colors

Dominant #045355 Anchor #382C1E Surface #ECE4D0 Accent #809C72 Secondary #3A3933

Dark Slate Gray anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #045355 Secondary #607474 Support #979286 Ink #16140F

Dark Slate Gray 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 Dark Slate Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #045355 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 33/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 10/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 60/100

High

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

Surface fit 39/100

Low

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #045355

For UI

For branding

For interior

For fashion

People also use #045355 with

Green Navy Oxblood 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 8.8:1. Use

Subtle surface Use #B9EFF0 for cards and hover fills. Tint 80

Avoid beside #043753 — 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 #045355 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: #045355;
  --color-base-rgb: 4 83 85;
  --color-base-oklch: oklch(40.2% 0.067 197.7);
  --color-50: #F0FEFE;
  --color-100: #D8FDFD;
  --color-200: #B1FAFB;
  --color-300: #7DF0F2;
  --color-400: #4EE2E4;
  --color-500: #2AC8CB;
  --color-600: #28989A;
  --color-700: #236B6C;
  --color-800: #1B4646;
  --color-900: #122B2B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F0FEFE',
    100: '#D8FDFD',
    200: '#B1FAFB',
    300: '#7DF0F2',
    400: '#4EE2E4',
    500: '#2AC8CB',
    600: '#28989A',
    700: '#236B6C',
    800: '#1B4646',
    900: '#122B2B',
  },
}

$base: #045355;
$base-ink: #FFFFFF;
$base-50: #F0FEFE;
$base-100: #D8FDFD;
$base-200: #B1FAFB;
$base-300: #7DF0F2;
$base-400: #4EE2E4;
$base-500: #2AC8CB;
$base-600: #28989A;
$base-700: #236B6C;
$base-800: #1B4646;
$base-900: #122B2B;
$base-hover: #034142;
$base-subtle: #94EAEB;

{
    "color": {
        "base": {
            "value": "#045355",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEFE",
                "type": "color"
            },
            "100": {
                "value": "#D8FDFD",
                "type": "color"
            },
            "200": {
                "value": "#B1FAFB",
                "type": "color"
            },
            "300": {
                "value": "#7DF0F2",
                "type": "color"
            },
            "400": {
                "value": "#4EE2E4",
                "type": "color"
            },
            "500": {
                "value": "#2AC8CB",
                "type": "color"
            },
            "600": {
                "value": "#28989A",
                "type": "color"
            },
            "700": {
                "value": "#236B6C",
                "type": "color"
            },
            "800": {
                "value": "#1B4646",
                "type": "color"
            },
            "900": {
                "value": "#122B2B",
                "type": "color"
            }
        }
    }
}