What color is #23455E?

#23455E is a dark cyan-blue. In RGB it is rgb(35, 69, 94), and in HSL hsl(205, 46%, 25%).

Is #23455E accessible as text?

On white, #23455E has a contrast ratio of 10.08:1 (passes WCAG AA for body text); on black it is 2.08:1 (fails). For text placed on #23455E, use white for the best readability.

What is the closest Tailwind color to #23455E?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #23455E?

#23455E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5D3B22. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #23455E below.

Is #23455E good for buttons?

#23455E works well for buttons and highlights, but use white text on #23455E — black text only reaches 2.08:1, below the 4.5:1 needed for normal-size labels.

Is #23455E the same as CSS darkslategray?

No — #23455E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#23455E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #23455E

Not just a swatch — here's how #23455E works with other colors. Named schemes with #23455E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #23455E Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Charcoal 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 #23455E Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Charcoal 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 #23455E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #47667E

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

Vintage Leather Lead · 5 colors

Lead #23455E Secondary #7F4438 Surface #E2DDC0 Accent #375245 Anchor #57233C

Charcoal 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 #23455E Secondary #5E6A73 Support #969386 Ink #16140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #23455E 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 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 37/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

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 51/100

Moderate

Workable accent with care around contrast.

Surface fit 43/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #23455E

For UI

For branding

For interior

For fashion

People also use #23455E with

Myrtle Green Midnight Blue Espresso Gainsboro Charcoal

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 10.1:1. Use

Subtle surface Use #CCDBE5 for cards and hover fills. Tint 80

Avoid beside #22315D — 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 #23455E 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: #23455E;
  --color-base-rgb: 35 69 94;
  --color-base-oklch: oklch(37.7% 0.059 242.4);
  --color-50: #F3F8FB;
  --color-100: #E1ECF5;
  --color-200: #C4D9E9;
  --color-300: #9ABDD5;
  --color-400: #739FBF;
  --color-500: #5281A3;
  --color-600: #44667E;
  --color-700: #354A5A;
  --color-800: #25323C;
  --color-900: #182025;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F3F8FB',
    100: '#E1ECF5',
    200: '#C4D9E9',
    300: '#9ABDD5',
    400: '#739FBF',
    500: '#5281A3',
    600: '#44667E',
    700: '#354A5A',
    800: '#25323C',
    900: '#182025',
  },
}

$base: #23455E;
$base-ink: #FFFFFF;
$base-50: #F3F8FB;
$base-100: #E1ECF5;
$base-200: #C4D9E9;
$base-300: #9ABDD5;
$base-400: #739FBF;
$base-500: #5281A3;
$base-600: #44667E;
$base-700: #354A5A;
$base-800: #25323C;
$base-900: #182025;
$base-hover: #1C374A;
$base-subtle: #B2C9DA;

{
    "color": {
        "base": {
            "value": "#23455E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E1ECF5",
                "type": "color"
            },
            "200": {
                "value": "#C4D9E9",
                "type": "color"
            },
            "300": {
                "value": "#9ABDD5",
                "type": "color"
            },
            "400": {
                "value": "#739FBF",
                "type": "color"
            },
            "500": {
                "value": "#5281A3",
                "type": "color"
            },
            "600": {
                "value": "#44667E",
                "type": "color"
            },
            "700": {
                "value": "#354A5A",
                "type": "color"
            },
            "800": {
                "value": "#25323C",
                "type": "color"
            },
            "900": {
                "value": "#182025",
                "type": "color"
            }
        }
    }
}