What color is #738BBF?

#738BBF is a medium blue. In RGB it is rgb(115, 139, 191), and in HSL hsl(221, 37%, 60%).

Is #738BBF accessible as text?

On white, #738BBF has a contrast ratio of 3.40:1 (fails WCAG AA for body text); on black it is 6.17:1 (passes). For text placed on #738BBF, use black for the best readability.

What is the closest Tailwind color to #738BBF?

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

What colors go well with #738BBF?

#738BBF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BFA773. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #738BBF below.

Is #738BBF good for buttons?

#738BBF works well for buttons and highlights, but use black text on #738BBF — white text only reaches 3.40:1, below the 4.5:1 needed for normal-size labels.

Is #738BBF the same as CSS lightslategray?

No — #738BBF is not the CSS named color lightslategray, but lightslategray (#778899) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#738BBF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #738BBF

Not just a swatch — here's how #738BBF works with other colors. Named schemes with #738BBF in its natural role, and a note on why the supporting colors balance it.

Nordic Calm Accent · 5 colors

Accent #738BBF Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A7 Anchor #2E3236

Glaucous keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Coastal Morning Lead · 5 colors

Lead #738BBF Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Japanese Sand Base · 5 colors

Base #738BBF Surface #EBEADD Highlight #F8F0E7 Secondary #BEACA2 Ink #2C2724

Glaucous sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Tech Product Signal · 5 colors

Signal #738BBF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #9AB0E1

Glaucous is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Glaucous.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #738BBF Secondary #AEB7CA Support #9D8F88 Ink #18140F

Glaucous 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 Glaucous carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #738BBF 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 30/100

Cool

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

Softness 56/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 36/100

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 54/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 43/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 32/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 71/100

High

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

Surface fit 40/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #738BBF

For UI

For branding

For interior

For fashion

People also use #738BBF with

Sky Blue Amethyst Sand Gainsboro 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 5.5:1. Use

Subtle surface Use #E5E9F0 for cards and hover fills. Tint 80

Avoid beside #7573BF — 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 #738BBF 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: #738BBF;
  --color-base-rgb: 115 139 191;
  --color-base-oklch: oklch(63.9% 0.083 265.1);
  --color-50: #F4F6FA;
  --color-100: #E3E8F3;
  --color-200: #C7D1E5;
  --color-300: #A0AFCF;
  --color-400: #7A8EB8;
  --color-500: #5A6E9B;
  --color-600: #4A5878;
  --color-700: #384256;
  --color-800: #282D39;
  --color-900: #1A1D24;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  glaucous: {
    50: '#F4F6FA',
    100: '#E3E8F3',
    200: '#C7D1E5',
    300: '#A0AFCF',
    400: '#7A8EB8',
    500: '#5A6E9B',
    600: '#4A5878',
    700: '#384256',
    800: '#282D39',
    900: '#1A1D24',
  },
}

$base: #738BBF;
$base-ink: #141310;
$base-50: #F4F6FA;
$base-100: #E3E8F3;
$base-200: #C7D1E5;
$base-300: #A0AFCF;
$base-400: #7A8EB8;
$base-500: #5A6E9B;
$base-600: #4A5878;
$base-700: #384256;
$base-800: #282D39;
$base-900: #1A1D24;
$base-hover: #4D6AA8;
$base-subtle: #D8DDE9;

{
    "color": {
        "base": {
            "value": "#738BBF",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E3E8F3",
                "type": "color"
            },
            "200": {
                "value": "#C7D1E5",
                "type": "color"
            },
            "300": {
                "value": "#A0AFCF",
                "type": "color"
            },
            "400": {
                "value": "#7A8EB8",
                "type": "color"
            },
            "500": {
                "value": "#5A6E9B",
                "type": "color"
            },
            "600": {
                "value": "#4A5878",
                "type": "color"
            },
            "700": {
                "value": "#384256",
                "type": "color"
            },
            "800": {
                "value": "#282D39",
                "type": "color"
            },
            "900": {
                "value": "#1A1D24",
                "type": "color"
            }
        }
    }
}

Palettes built on #738BBF

Color Lab

Pairs with #738BBF

UI roles & guardrails

In real applications

Scales

Every model

Export