#3978BC#3978BC

#3978BC is a mid, vivid cyan. Relative luminance 0.179; OKLCH L 56.4% C 0.124 H 252.4°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3978BC
RGB	rgb(57, 120, 188)
HSL	hsl(211, 53%, 48%)
HSV	hsv(211, 70%, 74%)
CMYK	cmyk(69.7%, 36.2%, 0%, 26.3%)
CIE-LAB	lab(49.41, 2.37, -41.63)
CIE-LCH	lch(49.41, 41.70, 273.26°)
OKLab	oklab(56.39% -0.0375 -0.1183)
OKLCH	oklch(56.39% 0.124 252.4)
XYZ	xyz(17.4776, 17.9318, 50.1073)
Luminance	0.1793 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978BC #BC7D39

analogous

#39B9BC #3978BC #3C39BC

triadic

#3978BC #BC3978 #78BC39

tetradic

#3978BC #BC39B9 #BC7D39 #39BC3C

square

#3978BC #BC39B9 #BC7D39 #39BC3C

split-complementary

#3978BC #BC3C39 #B9BC39

monochromatic

#1D3C5E #2B5A8D #3978BC #6397D0 #92B6DE

Accessibility & contrast

On white

4.58

#3978BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3978BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3978BC

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978BC	#FFFFFF	#000000	##000000
##3978BC	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#597CBF

Deuteranopia (green-blind)

#4670BB

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3978bc;
/* rgb */ color: rgb(57, 120, 188);
/* oklch */ color: oklch(56.4% 0.124 252.4);

Tailwind

colors: {
  custom: {
    50: '#7e9ed0',
    500: '#3978bc',
    950: '#000000',
  },
}

SCSS

$custom: #3978bc;
$custom-light: #7e9ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3978bc",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 188
  },
  "hsl": {
    "h": 211.145,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.56391,
    "c": 0.12412,
    "h": 252.4
  },
  "luminance": 0.17934
}

Semantic roles & 50–950 ramp

primary

#3978BC

secondary

#C9AA88

accent

#974BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3978BC

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

Preview Lab → · Contrast checker → · Palette generator →