What color is #378DBF?

#378DBF is a medium cyan-blue. In RGB it is rgb(55, 141, 191), and in HSL hsl(202, 55%, 48%).

Is #378DBF accessible as text?

On white, #378DBF has a contrast ratio of 3.67:1 (fails WCAG AA for body text); on black it is 5.72:1 (passes). For text placed on #378DBF, use black for the best readability.

What is the closest Tailwind color to #378DBF?

The nearest Tailwind CSS token is cyan-600 (#0092B8).

What colors go well with #378DBF?

#378DBF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BE6837. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #378DBF below.

Is #378DBF good for buttons?

#378DBF works well for buttons and highlights, but use black text on #378DBF — white text only reaches 3.67:1, below the 4.5:1 needed for normal-size labels.

Is #378DBF the same as CSS steelblue?

No — #378DBF is not the CSS named color steelblue, but steelblue (#4682B4) is the closest CSS named color.

#378DBF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #378DBF

Not just a swatch — here's how #378DBF works with other colors. Named schemes with #378DBF in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #378DBF Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Ocean 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 #378DBF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #69B2E1

Ocean 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 Ocean Blue.

Vintage Leather Lead · 5 colors

Lead #378DBF Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

Ocean 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 #378DBF Surface #EEE9D6 Anchor #592246 Accent #E4C2CC Secondary #322B30

Ocean 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 #378DBF Secondary #99B3C5 Support #969386 Ink #16140F

Ocean 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 Ocean Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #378DBF 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 17/100

Cool

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

Softness 50/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 39/100

Low

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 48/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 30/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 85/100

Very high

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

Surface fit 30/100

Low

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

Print safety 73/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #378DBF

For UI

For branding

For interior

For fashion

People also use #378DBF with

Medium Aquamarine Cerulean Copper Platinum Charcoal

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AA

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 5.1:1. Use

Subtle surface Use #DAE7EF for cards and hover fills. Tint 80

Avoid beside #375FBE — 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 #378DBF 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: #378DBF;
  --color-base-rgb: 55 141 191;
  --color-base-oklch: oklch(61.4% 0.111 238.1);
  --color-50: #F3F9FC;
  --color-100: #DFEEF6;
  --color-200: #C0DCED;
  --color-300: #94C1DB;
  --color-400: #6BA5C7;
  --color-500: #4A87AB;
  --color-600: #3F6A83;
  --color-700: #314D5E;
  --color-800: #23343E;
  --color-900: #172126;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  ocean-blue: {
    50: '#F3F9FC',
    100: '#DFEEF6',
    200: '#C0DCED',
    300: '#94C1DB',
    400: '#6BA5C7',
    500: '#4A87AB',
    600: '#3F6A83',
    700: '#314D5E',
    800: '#23343E',
    900: '#172126',
  },
}

$base: #378DBF;
$base-ink: #141310;
$base-50: #F3F9FC;
$base-100: #DFEEF6;
$base-200: #C0DCED;
$base-300: #94C1DB;
$base-400: #6BA5C7;
$base-500: #4A87AB;
$base-600: #3F6A83;
$base-700: #314D5E;
$base-800: #23343E;
$base-900: #172126;
$base-hover: #2C7098;
$base-subtle: #C7DCE8;

{
    "color": {
        "base": {
            "value": "#378DBF",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DFEEF6",
                "type": "color"
            },
            "200": {
                "value": "#C0DCED",
                "type": "color"
            },
            "300": {
                "value": "#94C1DB",
                "type": "color"
            },
            "400": {
                "value": "#6BA5C7",
                "type": "color"
            },
            "500": {
                "value": "#4A87AB",
                "type": "color"
            },
            "600": {
                "value": "#3F6A83",
                "type": "color"
            },
            "700": {
                "value": "#314D5E",
                "type": "color"
            },
            "800": {
                "value": "#23343E",
                "type": "color"
            },
            "900": {
                "value": "#172126",
                "type": "color"
            }
        }
    }
}

Palettes built on #378DBF

Color Lab

Pairs with #378DBF

UI roles & guardrails

In real applications

Scales

Every model

Export