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Cobalt Core Clear
Color detail

Cobalt Core Clear

Blue · Hue 220
Metrics
S 54% · L 48%
Contrast (WCAG)
on white5.6:1AAon black3.7:1AA Large
Save to journalSign in to saveStart palette from thisRecent trail

About this color

Cobalt Core Clear (#3864BC) belongs to the blue family — hue 220°, 54% saturation, 48% lightness. Copy the hex, RGB, or HSL value above, or paste the CSS custom property below into your stylesheet to reference this color directly.

CSS
:root {
  --colorarchive-cobalt-core-clear: #3864BC;
  --colorarchive-cobalt-core-clear-hsl: hsl(220, 54%, 48%);
  --colorarchive-cobalt-core-clear-rgb: rgb(56, 100, 188);
}

AI Color Names

Let AI suggest alternative poetic names for this color in English and Chinese.

Design Context

ProfessionalReliableFocused
Common in

Banking · Insurance · Enterprise Software

Pairs well with

White for clean authority, light orange for warm contrast, dark navy for depth

Design tip

The backbone of business interfaces. Use for primary actions and navigation. Blue links are the web's universal convention.

Cultural context ▶

Blue is the world's most popular color. It represents trust, competence, and stability across virtually all cultures.

Color Origins

Blue family

The most-loved color on the planet, and the most overused.

Heritage

Blue is one of the hardest colors for nature to make with pigment — and, historically, one of the most expensive to paint with. Ultramarine, ground from lapis lazuli mined in Afghanistan, could cost as much as gold in Renaissance Europe; Vermeer used it lavishly. Egyptian blue (the first synthetic pigment, ~3000 BCE) was lost for centuries and rediscovered in the 19th. Prussian blue (1704) quickly gave painters a cheap alternative to ultramarine; Yves Klein's IKB (1960) re-aristocratized blue.

Across cultures

In ancient Egypt blue was the color of the Nile and the heavens — sacred, protective. In China blue-and-white porcelain (qinghua) defined export ceramics for centuries. In Mediterranean traditions blue wards off the evil eye. In America, IBM's blue logo helped earn it the nickname 'Big Blue'; in Japan, indigo (ai) is the centuries-old workwear dye that became the ground tone of an entire textile tradition. Across the world blue is consistently rated the most-liked color — in one ten-country survey it led every other color by 8 to 18 points.

In the wild

Mark Zuckerberg has said Facebook is blue because he is red-green colorblind. Levi's blue is the natural color of indigo on cotton. Twitter Blue (#1DA1F2) defined social-media blue for years before the 2023 rebrand to X scrapped it. The blue checkmark, the blue link, the blue 'send' button — blue has become the default color of digital trust, to the point of being a UX cliché.

How it reads

Blue tends to recede — the eye focuses blue light slightly in front of the retina, which can make blue elements feel deep or distant. It reads as trustworthy, calm, corporate, and (at the cool end) cold. Light blues read airy and clinical; mid blues are the default for tech and finance; deep blues read as luxurious or naval. The omnipresence of blue in software is real: most enterprise UIs reach for it because it offends the fewest stakeholders, which is also the reason it can feel like the absence of a real choice.

This particular tone

A confident mid-tone — this is the workhorse register of the hue, and the band where many brand colors live.

Lightness band: At mid-lightness the hue carries its full character. This is the band where many identity colors live: bright enough to be distinctive at small sizes, deep enough to sit cleanly on a white canvas.

Saturation band: The clear, mid-saturation register is a common identity sweet spot — saturated enough to register as a 'real' color, restrained enough not to fight typography or photography placed over it.

Brands using a similar color

Within the public brand-guidelines reference catalog, these are the closest matches to #3864BC.

  • Instagramprimary
    Sunset Indigo · #515BD4
    →
  • Linearprimary
    Linear Indigo · #5E6AD2
    →
  • Discordprimary
    Blurple · #5865F2
    →

Cultures using a similar color

From the cultural-palette catalog, these regions feature a color close to #3864BC.

  • Korea (Obangsaek)Obangsaek Blue (청 / cheong)
    #1E68C1 · East — wood element, hanbok dyes
    →
  • MexicoTalavera Blue
    #2A52BE · Talavera Poblana tin-glazed pottery
    →
  • Turkey (Istanbul)Iznik Blue
    #1E5599 · Ottoman Iznik tile cobalt-glaze, 16th c.
    →

Color guides

Go deeper on using blue and color in design.

Brand & MarketingTechnology Brand Color Design: Trust, Intelligence, and the Blue ProblemColor PsychologyBlue Color Psychology in Branding: Why Every Bank and Tech Giant Chooses BlueUI DesignDark Mode Color Design: Beyond Inverting Your Palette

Tonal strip

All lightness levels at this hue and saturation. Click any to navigate.

Palette moves

Instead of stopping at one swatch, use nearby, opposite, and tonal neighbors to branch into a broader palette.

Lighter companion
Cobalt Radiant Clear
#4A75C9 · hsl(220, 54%, 54%)
Darker companion
Cobalt Velvet Clear
#3158A5 · hsl(220, 54%, 42%)
Complementary counterpoint
Apricot Core Clear
#BC9038 · hsl(40, 54%, 48%)
Analogous lead
Amethyst Core Clear
#4338BC · hsl(245, 54%, 48%)
Analogous echo
Azure Core Clear
#3890BC · hsl(200, 54%, 48%)
Triadic +120°
Garnet Core Clear
#BC3864 · hsl(340, 54%, 48%)
Triadic +240°
Moss Core Clear
#64BC38 · hsl(100, 54%, 48%)
Split-comp +150°
Ruby Core Clear
#BC4E38 · hsl(10, 54%, 48%)
Split-comp +210°
Honey Core Clear
#A6BC38 · hsl(70, 54%, 48%)
Export preview
Base: Cobalt Core Clear #3864BC
Lighter companion: Cobalt Radiant Clear #4A75C9
Darker companion: Cobalt Velvet Clear #3158A5
Complementary counterpoint: Apricot Core Clear #BC9038
Analogous lead: Amethyst Core Clear #4338BC
Analogous echo: Azure Core Clear #3890BC
Triadic +120°: Garnet Core Clear #BC3864
Triadic +240°: Moss Core Clear #64BC38
Split-comp +150°: Ruby Core Clear #BC4E38
Split-comp +210°: Honey Core Clear #A6BC38

Compare

See how Cobalt Core Clear compares side by side with related colors.

vsCobalt Radiant ClearvsCobalt Velvet ClearvsApricot Core ClearvsAmethyst Core ClearvsAzure Core ClearvsGarnet Core Clear

Nearest neighbors

The closest archive matches by hue, saturation, and lightness.

Search by hex
Nearby match
Cobalt Velvet Clear
#3158A5 · hsl(220, 54%, 42%)
Nearby match
Cobalt Radiant Clear
#4A75C9 · hsl(220, 54%, 54%)
Nearby match
Cobalt Tone Clear
#6287D0 · hsl(220, 54%, 60%)
Nearby match
Cobalt Core Soft
#516DA4 · hsl(220, 34%, 48%)
Nearby match
Cobalt Core Vivid
#205CD5 · hsl(220, 74%, 48%)
Nearby match
Cobalt Dusk Clear
#284786 · hsl(220, 54%, 34%)

Accessible pairings

Archive colors that meet WCAG contrast standards when paired with this color. Use as text-on-background or background-on-text.

Contrast checker
AA5.4:1
Apricot Veil Faint
#FAFAF9
AA5.4:1
Apricot Veil Muted
#FBFAF9
AA5.4:1
Apricot Veil Dust
#FBFAF9
AA5.4:1
Apricot Veil Soft
#FCFAF8
AA5.5:1
Apricot Veil Clear
#FDFBF7
AA5.5:1
Apricot Veil Vivid
#FEFBF6

Color Vision Simulation

How this color appears with different color vision deficiencies.

Full simulator
Deuteranopia
#4C49A8
Protanopia
#4F4FAC
Tritanopia
#3B9E9A
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Saturation ladder

Same hue and lightness, from gray to pure

Search
Cobalt Core Faint#6E7687 · hsl(220, 10%, 48%)Cobalt Core Muted#647390 · hsl(220, 18%, 48%)Cobalt Core Dust#5B709A · hsl(220, 26%, 48%)Cobalt Core Soft#516DA4 · hsl(220, 34%, 48%)Cobalt Core Clear#3864BC · hsl(220, 54%, 48%)Cobalt Core Vivid#205CD5 · hsl(220, 74%, 48%)Cobalt Core Bright#1458E1 · hsl(220, 84%, 48%)Cobalt Core Pure#0A55EB · hsl(220, 92%, 48%)
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Appears in collections
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