What color is #033F67?

#033F67 is a dark, vivid cyan-blue. In RGB it is rgb(3, 63, 103), and in HSL hsl(204, 94%, 21%).

Is #033F67 accessible as text?

On white, #033F67 has a contrast ratio of 10.99:1 (passes WCAG AA for body text); on black it is 1.91:1 (fails). For text placed on #033F67, use white for the best readability.

What is the closest Tailwind color to #033F67?

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

What colors go well with #033F67?

#033F67 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #682B03. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #033F67 below.

Is #033F67 good for buttons?

#033F67 works well for buttons and highlights, but use white text on #033F67 — black text only reaches 1.91:1, below the 4.5:1 needed for normal-size labels.

Is #033F67 the same as CSS darkslategray?

No — #033F67 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#033F67 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #033F67

Not just a swatch — here's how #033F67 works with other colors. Named schemes with #033F67 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #033F67 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A1 Anchor #20344A

Yale 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 #033F67 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Yale 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 #033F67 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #336187

Yale 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 Yale Blue.

Vintage Leather Lead · 5 colors

Lead #033F67 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

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 #F6F4EF Accent #033F67 Secondary #546473 Support #969386 Ink #16140F

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.

Build a working theme in the generator →

Color Lab

How #033F67 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 64/100

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 34/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 53/100

Moderate

Workable accent with care around contrast.

Surface fit 35/100

Low

Usable as a tinted surface in measured doses.

Print safety 80/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #033F67

For UI

For branding

For interior

For fashion

People also use #033F67 with

Dark Cyan Navy Blue Espresso 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 11.0:1. Use

Subtle surface Use #BBDCF2 for cards and hover fills. Tint 80

Avoid beside #031E68 — 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 #033F67 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: #033F67;
  --color-base-rgb: 3 63 103;
  --color-base-oklch: oklch(35.6% 0.089 245.6);
  --color-50: #F0F9FE;
  --color-100: #D8EEFD;
  --color-200: #B1DEFC;
  --color-300: #7BC4F4;
  --color-400: #4BA9E7;
  --color-500: #288BCD;
  --color-600: #266D9B;
  --color-700: #214F6D;
  --color-800: #1A3547;
  --color-900: #12212B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  yale-blue: {
    50: '#F0F9FE',
    100: '#D8EEFD',
    200: '#B1DEFC',
    300: '#7BC4F4',
    400: '#4BA9E7',
    500: '#288BCD',
    600: '#266D9B',
    700: '#214F6D',
    800: '#1A3547',
    900: '#12212B',
  },
}

$base: #033F67;
$base-ink: #FFFFFF;
$base-50: #F0F9FE;
$base-100: #D8EEFD;
$base-200: #B1DEFC;
$base-300: #7BC4F4;
$base-400: #4BA9E7;
$base-500: #288BCD;
$base-600: #266D9B;
$base-700: #214F6D;
$base-800: #1A3547;
$base-900: #12212B;
$base-hover: #033353;
$base-subtle: #97CBEE;

{
    "color": {
        "base": {
            "value": "#033F67",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EEFD",
                "type": "color"
            },
            "200": {
                "value": "#B1DEFC",
                "type": "color"
            },
            "300": {
                "value": "#7BC4F4",
                "type": "color"
            },
            "400": {
                "value": "#4BA9E7",
                "type": "color"
            },
            "500": {
                "value": "#288BCD",
                "type": "color"
            },
            "600": {
                "value": "#266D9B",
                "type": "color"
            },
            "700": {
                "value": "#214F6D",
                "type": "color"
            },
            "800": {
                "value": "#1A3547",
                "type": "color"
            },
            "900": {
                "value": "#12212B",
                "type": "color"
            }
        }
    }
}

Palettes built on #033F67

Color Lab

Pairs with #033F67

UI roles & guardrails

In real applications

Scales

Every model

Export