#3978BA#3978BA

#3978BA is a mid, vivid cyan. Relative luminance 0.178; OKLCH L 56.3% C 0.122 H 251.8°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3978BA
RGB	rgb(57, 120, 186)
HSL	hsl(211, 53%, 48%)
HSV	hsv(211, 69%, 73%)
CMYK	cmyk(69.4%, 35.5%, 0%, 27.1%)
CIE-LAB	lab(49.31, 1.66, -40.64)
CIE-LCH	lch(49.31, 40.68, 272.33°)
OKLab	oklab(56.28% -0.038 -0.1154)
OKLCH	oklch(56.28% 0.122 251.8)
XYZ	xyz(17.2635, 17.8461, 48.9797)
Luminance	0.1785 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3978BA #BA7B39

analogous

#39B8BA #3978BA #3B39BA

triadic

#3978BA #BA3978 #78BA39

tetradic

#3978BA #BA39B8 #BA7B39 #39BA3B

square

#3978BA #BA39B8 #BA7B39 #39BA3B

split-complementary

#3978BA #BA3B39 #B8BA39

monochromatic

#1C3C5C #2B5A8B #3978BA #6197CF #90B6DD

Accessibility & contrast

On white

4.60

#3978BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#3978BA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3978BA

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3978BA	#FFFFFF	#000000	##FFFFFF
##3978BA	1.00	4.60	4.57	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7CBD

Deuteranopia (green-blind)

#4870B9

Tritanopia (blue-blind)

#008790

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3978ba;
/* rgb */ color: rgb(57, 120, 186);
/* oklch */ color: oklch(56.3% 0.122 251.8);

Tailwind

colors: {
  custom: {
    50: '#7e9ecf',
    500: '#3978ba',
    950: '#000000',
  },
}

SCSS

$custom: #3978ba;
$custom-light: #7e9ecf;
$custom-dark: #000000;

JSON

{
  "hex": "#3978ba",
  "rgb": {
    "r": 57,
    "g": 120,
    "b": 186
  },
  "hsl": {
    "h": 210.698,
    "s": 53.086,
    "l": 47.647
  },
  "oklch": {
    "l": 0.56275,
    "c": 0.12153,
    "h": 251.8
  },
  "luminance": 0.17848
}

Semantic roles & 50–950 ramp

primary

#3978BA

secondary

#C8A887

accent

#964BDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3978BA

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

Preview Lab → · Contrast checker → · Palette generator →