What color is #1F3C70?

#1F3C70 is a dark blue. In RGB it is rgb(31, 60, 112), and in HSL hsl(219, 57%, 28%).

Is #1F3C70 accessible as text?

On white, #1F3C70 has a contrast ratio of 10.83:1 (passes WCAG AA for body text); on black it is 1.94:1 (fails). For text placed on #1F3C70, use white for the best readability.

What is the closest Tailwind color to #1F3C70?

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

What colors go well with #1F3C70?

#1F3C70 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #70541F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1F3C70 below.

Is #1F3C70 good for buttons?

#1F3C70 works well for buttons and highlights, but use white text on #1F3C70 — black text only reaches 1.94:1, below the 4.5:1 needed for normal-size labels.

Is #1F3C70 the same as CSS darkslateblue?

No — #1F3C70 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#1F3C70 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1F3C70

Not just a swatch — here's how #1F3C70 works with other colors. Named schemes with #1F3C70 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1F3C70 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Yale Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Luxury Packaging Feature · 5 colors

Feature #1F3C70 Anchor #141210 Accent #ADAE53 Secondary #232933 Surface #F0EEE3

Yale Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #1F3C70 Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #1A1B3F

Yale Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Yale Blue.

Vintage Leather Lead · 5 colors

Lead #1F3C70 Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Yale 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 #1F3C70 Secondary #596578 Support #9D8F88 Ink #18140F

Yale 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 Yale Blue carrying the quiet middle.

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Color Lab

How #1F3C70 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 25/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

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 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 37/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 57/100

Moderate

Workable accent with care around contrast.

Surface fit 32/100

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 #1F3C70

For UI

For branding

For interior

For fashion

People also use #1F3C70 with

Dark Cyan Midnight Blue Coffee 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 10.8:1. Use

Subtle surface Use #CBD6E9 for cards and hover fills. Tint 80

Avoid beside #1F2070 — 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 #1F3C70 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: #1F3C70;
  --color-base-rgb: 31 60 112;
  --color-base-oklch: oklch(36.3% 0.096 261.1);
  --color-50: #F3F6FC;
  --color-100: #DEE7F7;
  --color-200: #BFCFED;
  --color-300: #93ADDC;
  --color-400: #6A8BC8;
  --color-500: #486BAD;
  --color-600: #3D5684;
  --color-700: #30405E;
  --color-800: #232C3E;
  --color-900: #171C26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F3F6FC',
    100: '#DEE7F7',
    200: '#BFCFED',
    300: '#93ADDC',
    400: '#6A8BC8',
    500: '#486BAD',
    600: '#3D5684',
    700: '#30405E',
    800: '#232C3E',
    900: '#171C26',
  },
}

$base: #1F3C70;
$base-ink: #FFFFFF;
$base-50: #F3F6FC;
$base-100: #DEE7F7;
$base-200: #BFCFED;
$base-300: #93ADDC;
$base-400: #6A8BC8;
$base-500: #486BAD;
$base-600: #3D5684;
$base-700: #30405E;
$base-800: #232C3E;
$base-900: #171C26;
$base-hover: #192F5A;
$base-subtle: #B0C1E0;

{
    "color": {
        "base": {
            "value": "#1F3C70",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE7F7",
                "type": "color"
            },
            "200": {
                "value": "#BFCFED",
                "type": "color"
            },
            "300": {
                "value": "#93ADDC",
                "type": "color"
            },
            "400": {
                "value": "#6A8BC8",
                "type": "color"
            },
            "500": {
                "value": "#486BAD",
                "type": "color"
            },
            "600": {
                "value": "#3D5684",
                "type": "color"
            },
            "700": {
                "value": "#30405E",
                "type": "color"
            },
            "800": {
                "value": "#232C3E",
                "type": "color"
            },
            "900": {
                "value": "#171C26",
                "type": "color"
            }
        }
    }
}