What color is #1F508C?

#1F508C is a dark blue. In RGB it is rgb(31, 80, 140), and in HSL hsl(213, 64%, 34%).

Is #1F508C accessible as text?

On white, #1F508C has a contrast ratio of 8.13:1 (passes WCAG AA for body text); on black it is 2.58:1 (fails). For text placed on #1F508C, use white for the best readability.

What is the closest Tailwind color to #1F508C?

The nearest Tailwind CSS token is sky-800 (#00598A).

What colors go well with #1F508C?

#1F508C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8E5C1F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1F508C below.

Is #1F508C good for buttons?

#1F508C works well for buttons and highlights, but use white text on #1F508C — black text only reaches 2.58:1, below the 4.5:1 needed for normal-size labels.

Is #1F508C the same as CSS darkslateblue?

No — #1F508C is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#1F508C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1F508C

Not just a swatch — here's how #1F508C works with other colors. Named schemes with #1F508C in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1F508C 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.

Tech Product Signal · 5 colors

Signal #1F508C Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4873AC

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 #1F508C Secondary #7F4537 Surface #E1DDC1 Accent #375246 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.

Berry & Cream Lead · 5 colors

Lead #1F508C Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CA Secondary #322B2F

Classic Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #1F508C Secondary #68798F Support #9D8F89 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 #1F508C 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 20/100

Cool

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 57/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 44/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 30/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 82/100

Very high

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

Surface fit 23/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 77/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #1F508C

For UI

For branding

For interior

For fashion

People also use #1F508C with

Light Sea Green Klein Blue Raw Umber 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 8.1:1. Use

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

Avoid beside #1F2C8E — 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 #1F508C at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #1F508C;
  --color-base-rgb: 31 80 140;
  --color-base-oklch: oklch(43.1% 0.112 255.3);
  --color-50: #F2F7FD;
  --color-100: #DDE9F8;
  --color-200: #BCD4F0;
  --color-300: #8EB3E1;
  --color-400: #6494CE;
  --color-500: #4275B3;
  --color-600: #395D89;
  --color-700: #2E4561;
  --color-800: #212F40;
  --color-900: #161E27;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F2F7FD',
    100: '#DDE9F8',
    200: '#BCD4F0',
    300: '#8EB3E1',
    400: '#6494CE',
    500: '#4275B3',
    600: '#395D89',
    700: '#2E4561',
    800: '#212F40',
    900: '#161E27',
  },
}

$base: #1F508C;
$base-ink: #FFFFFF;
$base-50: #F2F7FD;
$base-100: #DDE9F8;
$base-200: #BCD4F0;
$base-300: #8EB3E1;
$base-400: #6494CE;
$base-500: #4275B3;
$base-600: #395D89;
$base-700: #2E4561;
$base-800: #212F40;
$base-900: #161E27;
$base-hover: #194172;
$base-subtle: #B4CAE5;

{
    "color": {
        "base": {
            "value": "#1F508C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F7FD",
                "type": "color"
            },
            "100": {
                "value": "#DDE9F8",
                "type": "color"
            },
            "200": {
                "value": "#BCD4F0",
                "type": "color"
            },
            "300": {
                "value": "#8EB3E1",
                "type": "color"
            },
            "400": {
                "value": "#6494CE",
                "type": "color"
            },
            "500": {
                "value": "#4275B3",
                "type": "color"
            },
            "600": {
                "value": "#395D89",
                "type": "color"
            },
            "700": {
                "value": "#2E4561",
                "type": "color"
            },
            "800": {
                "value": "#212F40",
                "type": "color"
            },
            "900": {
                "value": "#161E27",
                "type": "color"
            }
        }
    }
}