What color is #1F283D?

#1F283D is a dark, muted blue. In RGB it is rgb(31, 40, 61), and in HSL hsl(222, 33%, 18%).

Is #1F283D accessible as text?

On white, #1F283D has a contrast ratio of 14.69:1 (passes WCAG AA for body text); on black it is 1.43:1 (fails). For text placed on #1F283D, use white for the best readability.

What is the closest Tailwind color to #1F283D?

The nearest Tailwind CSS token is mist-800 (#22292B).

What colors go well with #1F283D?

#1F283D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3D341F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1F283D below.

Is #1F283D good for buttons?

#1F283D works well for buttons and highlights, but use white text on #1F283D — black text only reaches 1.43:1, below the 4.5:1 needed for normal-size labels.

Is #1F283D the same as CSS midnightblue?

No — #1F283D is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#1F283D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1F283D

Not just a swatch — here's how #1F283D works with other colors. Named schemes with #1F283D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1F283D Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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 #1F283D Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A7 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 #1F283D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3E475C

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 #1F283D Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

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 #F8F4EF Accent #1F283D Secondary #494D55 Support #9D8F88 Ink #18140F

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 #1F283D 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 40/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 69/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

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

Brand distinctiveness 16/100

Very low

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

UI accent fit 22/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 93/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1F283D

For UI

For branding

For interior

For fashion

People also use #1F283D with

Dark Slate Gray Russian Violet 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 14.7:1. Use

Subtle surface Use #CBD1DF for cards and hover fills. Tint 80

Avoid beside #201F3D — 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 #1F283D 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: #1F283D;
  --color-base-rgb: 31 40 61;
  --color-base-oklch: oklch(27.9% 0.041 266.0);
  --color-50: #F5F6FA;
  --color-100: #E3E8F2;
  --color-200: #C9D1E4;
  --color-300: #A2AFCD;
  --color-400: #7E8EB4;
  --color-500: #5D6F97;
  --color-600: #4C5975;
  --color-700: #3A4255;
  --color-800: #292D38;
  --color-900: #1A1D23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F5F6FA',
    100: '#E3E8F2',
    200: '#C9D1E4',
    300: '#A2AFCD',
    400: '#7E8EB4',
    500: '#5D6F97',
    600: '#4C5975',
    700: '#3A4255',
    800: '#292D38',
    900: '#1A1D23',
  },
}

$base: #1F283D;
$base-ink: #FFFFFF;
$base-50: #F5F6FA;
$base-100: #E3E8F2;
$base-200: #C9D1E4;
$base-300: #A2AFCD;
$base-400: #7E8EB4;
$base-500: #5D6F97;
$base-600: #4C5975;
$base-700: #3A4255;
$base-800: #292D38;
$base-900: #1A1D23;
$base-hover: #192031;
$base-subtle: #B1BAD0;

{
    "color": {
        "base": {
            "value": "#1F283D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E3E8F2",
                "type": "color"
            },
            "200": {
                "value": "#C9D1E4",
                "type": "color"
            },
            "300": {
                "value": "#A2AFCD",
                "type": "color"
            },
            "400": {
                "value": "#7E8EB4",
                "type": "color"
            },
            "500": {
                "value": "#5D6F97",
                "type": "color"
            },
            "600": {
                "value": "#4C5975",
                "type": "color"
            },
            "700": {
                "value": "#3A4255",
                "type": "color"
            },
            "800": {
                "value": "#292D38",
                "type": "color"
            },
            "900": {
                "value": "#1A1D23",
                "type": "color"
            }
        }
    }
}