What color is #123748?

#123748 is a dark cyan-blue. In RGB it is rgb(18, 55, 72), and in HSL hsl(199, 60%, 18%).

Is #123748 accessible as text?

On white, #123748 has a contrast ratio of 12.61:1 (passes WCAG AA for body text); on black it is 1.67:1 (fails). For text placed on #123748, use white for the best readability.

What is the closest Tailwind color to #123748?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #123748?

#123748 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #492412. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #123748 below.

Is #123748 good for buttons?

#123748 works well for buttons and highlights, but use white text on #123748 — black text only reaches 1.67:1, below the 4.5:1 needed for normal-size labels.

Is #123748 the same as CSS darkslategray?

No — #123748 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#123748 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #123748

Not just a swatch — here's how #123748 works with other colors. Named schemes with #123748 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #123748 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Prussian 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 #123748 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Prussian 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 #123748 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #375767

Prussian 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 Prussian Blue.

Vintage Leather Lead · 5 colors

Lead #123748 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Prussian 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 #123748 Secondary #4E5A60 Support #969386 Ink #16140F

Prussian 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 Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #123748 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 35/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 65/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 20/100

Very low

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

UI accent fit 33/100

Low

Workable accent with care around contrast.

Surface fit 49/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #123748

For UI

For branding

For interior

For fashion

People also use #123748 with

Hunter Green Navy Bistre Platinum 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 12.6:1. Use

Subtle surface Use #C3DCE7 for cards and hover fills. Tint 80

Avoid beside #122649 — 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 #123748 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: #123748;
  --color-base-rgb: 18 55 72;
  --color-base-oklch: oklch(31.9% 0.051 231.5);
  --color-50: #F2F9FC;
  --color-100: #DEEFF8;
  --color-200: #BEDFEF;
  --color-300: #91C6DE;
  --color-400: #67ABCB;
  --color-500: #468EAF;
  --color-600: #3C6F86;
  --color-700: #2F5060;
  --color-800: #22363F;
  --color-900: #162227;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F2F9FC',
    100: '#DEEFF8',
    200: '#BEDFEF',
    300: '#91C6DE',
    400: '#67ABCB',
    500: '#468EAF',
    600: '#3C6F86',
    700: '#2F5060',
    800: '#22363F',
    900: '#162227',
  },
}

$base: #123748;
$base-ink: #FFFFFF;
$base-50: #F2F9FC;
$base-100: #DEEFF8;
$base-200: #BEDFEF;
$base-300: #91C6DE;
$base-400: #67ABCB;
$base-500: #468EAF;
$base-600: #3C6F86;
$base-700: #2F5060;
$base-800: #22363F;
$base-900: #162227;
$base-hover: #0F2D3B;
$base-subtle: #A4CBDD;

{
    "color": {
        "base": {
            "value": "#123748",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DEEFF8",
                "type": "color"
            },
            "200": {
                "value": "#BEDFEF",
                "type": "color"
            },
            "300": {
                "value": "#91C6DE",
                "type": "color"
            },
            "400": {
                "value": "#67ABCB",
                "type": "color"
            },
            "500": {
                "value": "#468EAF",
                "type": "color"
            },
            "600": {
                "value": "#3C6F86",
                "type": "color"
            },
            "700": {
                "value": "#2F5060",
                "type": "color"
            },
            "800": {
                "value": "#22363F",
                "type": "color"
            },
            "900": {
                "value": "#162227",
                "type": "color"
            }
        }
    }
}