#3977BB#3977BB

#3977BB is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.1% C 0.124 H 252.7°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3977BB
RGB	rgb(57, 119, 187)
HSL	hsl(211, 53%, 48%)
HSV	hsv(211, 70%, 73%)
CMYK	cmyk(69.5%, 36.4%, 0%, 26.7%)
CIE-LAB	lab(49.07, 2.62, -41.60)
CIE-LCH	lch(49.07, 41.68, 273.61°)
OKLab	oklab(56.1% -0.0368 -0.1182)
OKLCH	oklch(56.1% 0.124 252.7)
XYZ	xyz(17.2505, 17.6495, 49.5016)
Luminance	0.1765 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977BB #BB7D39

analogous

#39B8BB #3977BB #3C39BB

triadic

#3977BB #BB3977 #77BB39

tetradic

#3977BB #BB39B8 #BB7D39 #39BB3C

square

#3977BB #BB39B8 #BB7D39 #39BB3C

split-complementary

#3977BB #BB3C39 #B8BB39

monochromatic

#1C3B5D #2B598C #3977BB #6296CF #91B5DD

Accessibility & contrast

On white

4.64

#3977BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3977BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3977BB

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977BB	#FFFFFF	#000000	##FFFFFF
##3977BB	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#587BBE

Deuteranopia (green-blind)

#466FBA

Tritanopia (blue-blind)

#008790

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3977bb;
/* rgb */ color: rgb(57, 119, 187);
/* oklch */ color: oklch(56.1% 0.124 252.7);

Tailwind

colors: {
  custom: {
    50: '#7e9dd0',
    500: '#3977bb',
    950: '#000000',
  },
}

SCSS

$custom: #3977bb;
$custom-light: #7e9dd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3977bb",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 187
  },
  "hsl": {
    "h": 211.385,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.56104,
    "c": 0.12382,
    "h": 252.7
  },
  "luminance": 0.17651
}

Semantic roles & 50–950 ramp

primary

#3977BB

secondary

#C8A987

accent

#974BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3977BB

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

Preview Lab → · Contrast checker → · Palette generator →