#3978BE#3978BE

#3978BE is a mid, vivid cyan. Relative luminance 0.180; OKLCH L 56.5% C 0.127 H 253.0°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3978BE
RGB	rgb(57, 120, 190)
HSL	hsl(212, 54%, 48%)
HSV	hsv(212, 70%, 75%)
CMYK	cmyk(70%, 36.8%, 0%, 25.5%)
CIE-LAB	lab(49.52, 3.09, -42.61)
CIE-LCH	lch(49.52, 42.72, 274.15°)
OKLab	oklab(56.51% -0.037 -0.1212)
OKLCH	oklch(56.51% 0.127 253)
XYZ	xyz(17.6946, 18.0186, 51.2506)
Luminance	0.1802 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978BE #BE7F39

analogous

#39BABE #3978BE #3C39BE

triadic

#3978BE #BE3978 #78BE39

tetradic

#3978BE #BE39BA #BE7F39 #39BE3C

square

#3978BE #BE39BA #BE7F39 #39BE3C

split-complementary

#3978BE #BE3C39 #BABE39

monochromatic

#1D3D60 #2B5A8F #3978BE #6497D0 #93B7DF

Accessibility & contrast

On white

4.56

#3978BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3978BE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978BE

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978BE	#FFFFFF	#000000	##000000
##3978BE	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#587DC1

Deuteranopia (green-blind)

#4570BD

Tritanopia (blue-blind)

#008892

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3978be;
/* rgb */ color: rgb(57, 120, 190);
/* oklch */ color: oklch(56.5% 0.127 253.0);

Tailwind

colors: {
  custom: {
    50: '#7f9ed2',
    500: '#3978be',
    950: '#000000',
  },
}

SCSS

$custom: #3978be;
$custom-light: #7f9ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3978be",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 190
  },
  "hsl": {
    "h": 211.579,
    "s": 53.846,
    "l": 48.431
  },
  "oklch": {
    "l": 0.56508,
    "c": 0.1267,
    "h": 253
  },
  "luminance": 0.18021
}

Semantic roles & 50–950 ramp

primary

#3978BE

secondary

#CAAB89

accent

#984BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3978BE

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →