What color is #1F4670?

#1F4670 is a dark blue. In RGB it is rgb(31, 70, 112), and in HSL hsl(211, 57%, 28%).

Is #1F4670 accessible as text?

On white, #1F4670 has a contrast ratio of 9.69:1 (passes WCAG AA for body text); on black it is 2.17:1 (fails). For text placed on #1F4670, use white for the best readability.

What is the closest Tailwind color to #1F4670?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #1F4670?

#1F4670 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #70491F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1F4670 below.

Is #1F4670 good for buttons?

#1F4670 works well for buttons and highlights, but use white text on #1F4670 — black text only reaches 2.17:1, below the 4.5:1 needed for normal-size labels.

Is #1F4670 the same as CSS darkslategray?

No — #1F4670 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#1F4670 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1F4670

Not just a swatch — here's how #1F4670 works with other colors. Named schemes with #1F4670 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1F4670 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #1F4670 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 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 #1F4670 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #456890

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 #1F4670 Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

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 #1F4670 Secondary #5F6D7C Support #959386 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 #1F4670 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 27/100

Cool

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

Softness 35/100

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 45/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 65/100

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 62/100

High

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

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1F4670

For UI

For branding

For interior

For fashion

People also use #1F4670 with

Dark Cyan Midnight Blue Sepia 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 9.7:1. Use

Subtle surface Use #CBDAE9 for cards and hover fills. Tint 80

Avoid beside #1F2B70 — 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 #1F4670 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

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: #1F4670;
  --color-base-rgb: 31 70 112;
  --color-base-oklch: oklch(38.8% 0.084 252.3);
  --color-50: #F3F7FC;
  --color-100: #DEEAF7;
  --color-200: #BFD5ED;
  --color-300: #93B6DC;
  --color-400: #6A97C8;
  --color-500: #4879AD;
  --color-600: #3D6084;
  --color-700: #30475E;
  --color-800: #23303E;
  --color-900: #171E26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F3F7FC',
    100: '#DEEAF7',
    200: '#BFD5ED',
    300: '#93B6DC',
    400: '#6A97C8',
    500: '#4879AD',
    600: '#3D6084',
    700: '#30475E',
    800: '#23303E',
    900: '#171E26',
  },
}

$base: #1F4670;
$base-ink: #FFFFFF;
$base-50: #F3F7FC;
$base-100: #DEEAF7;
$base-200: #BFD5ED;
$base-300: #93B6DC;
$base-400: #6A97C8;
$base-500: #4879AD;
$base-600: #3D6084;
$base-700: #30475E;
$base-800: #23303E;
$base-900: #171E26;
$base-hover: #19385A;
$base-subtle: #B0C7E0;

{
    "color": {
        "base": {
            "value": "#1F4670",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FC",
                "type": "color"
            },
            "100": {
                "value": "#DEEAF7",
                "type": "color"
            },
            "200": {
                "value": "#BFD5ED",
                "type": "color"
            },
            "300": {
                "value": "#93B6DC",
                "type": "color"
            },
            "400": {
                "value": "#6A97C8",
                "type": "color"
            },
            "500": {
                "value": "#4879AD",
                "type": "color"
            },
            "600": {
                "value": "#3D6084",
                "type": "color"
            },
            "700": {
                "value": "#30475E",
                "type": "color"
            },
            "800": {
                "value": "#23303E",
                "type": "color"
            },
            "900": {
                "value": "#171E26",
                "type": "color"
            }
        }
    }
}

Palettes built on #1F4670

Color Lab

Pairs with #1F4670

UI roles & guardrails

In real applications

Scales

Every model

Export