#3978BD#3978BD

#3978BD is a mid, vivid cyan. Relative luminance 0.180; OKLCH L 56.4% C 0.125 H 252.7°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3978BD
RGB	rgb(57, 120, 189)
HSL	hsl(211, 54%, 48%)
HSV	hsv(211, 70%, 74%)
CMYK	cmyk(69.8%, 36.5%, 0%, 25.9%)
CIE-LAB	lab(49.47, 2.73, -42.12)
CIE-LCH	lch(49.47, 42.21, 273.71°)
OKLab	oklab(56.45% -0.0373 -0.1197)
OKLCH	oklch(56.45% 0.125 252.7)
XYZ	xyz(17.5857, 17.9751, 50.6770)
Luminance	0.1798 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978BD #BD7E39

analogous

#39BABD #3978BD #3C39BD

triadic

#3978BD #BD3978 #78BD39

tetradic

#3978BD #BD39BA #BD7E39 #39BD3C

square

#3978BD #BD39BA #BD7E39 #39BD3C

split-complementary

#3978BD #BD3C39 #BABD39

monochromatic

#1D3C5F #2B5A8E #3978BD #6397D0 #92B6DE

Accessibility & contrast

On white

4.57

#3978BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3978BD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978BD

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978BD	#FFFFFF	#000000	##000000
##3978BD	1.00	4.57	4.60	4.60
#FFFFFF	4.57	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)

#597CC0

Deuteranopia (green-blind)

#4670BC

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3978bd;
/* rgb */ color: rgb(57, 120, 189);
/* oklch */ color: oklch(56.4% 0.125 252.7);

Tailwind

colors: {
  custom: {
    50: '#7f9ed1',
    500: '#3978bd',
    950: '#000000',
  },
}

SCSS

$custom: #3978bd;
$custom-light: #7f9ed1;
$custom-dark: #000000;

JSON

{
  "hex": "#3978bd",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 189
  },
  "hsl": {
    "h": 211.364,
    "s": 53.659,
    "l": 48.235
  },
  "oklch": {
    "l": 0.56449,
    "c": 0.12541,
    "h": 252.7
  },
  "luminance": 0.17977
}

Semantic roles & 50–950 ramp

primary

#3978BD

secondary

#C9AA89

accent

#974BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3978BD

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

Preview Lab → · Contrast checker → · Palette generator →