#3977BF#3977BF

#3977BF is a mid, vivid cyan. Relative luminance 0.178; OKLCH L 56.3% C 0.129 H 253.9°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3977BF
RGB	rgb(57, 119, 191)
HSL	hsl(212, 54%, 49%)
HSV	hsv(212, 70%, 75%)
CMYK	cmyk(70.2%, 37.7%, 0%, 25.1%)
CIE-LAB	lab(49.28, 4.06, -43.56)
CIE-LCH	lch(49.28, 43.75, 275.33°)
OKLab	oklab(56.34% -0.0358 -0.124)
OKLCH	oklch(56.34% 0.129 253.9)
XYZ	xyz(17.6847, 17.8232, 51.7883)
Luminance	0.1782 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977BF #BF8139

analogous

#39BABF #3977BF #3E39BF

triadic

#3977BF #BF3977 #77BF39

tetradic

#3977BF #BF39BA #BF8139 #39BF3E

square

#3977BF #BF39BA #BF8139 #39BF3E

split-complementary

#3977BF #BF3E39 #BABF39

monochromatic

#1D3C61 #2B5A90 #3977BF #6497D1 #93B6DF

Accessibility & contrast

On white

4.60

#3977BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3977BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3977BF

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977BF	#FFFFFF	#000000	##FFFFFF
##3977BF	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#567CC2

Deuteranopia (green-blind)

#426FBE

Tritanopia (blue-blind)

#008892

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3977bf;
/* rgb */ color: rgb(57, 119, 191);
/* oklch */ color: oklch(56.3% 0.129 253.9);

Tailwind

colors: {
  custom: {
    50: '#7f9dd3',
    500: '#3977bf',
    950: '#000000',
  },
}

SCSS

$custom: #3977bf;
$custom-light: #7f9dd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3977bf",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 191
  },
  "hsl": {
    "h": 212.239,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.56339,
    "c": 0.12905,
    "h": 253.9
  },
  "luminance": 0.17825
}

Semantic roles & 50–950 ramp

primary

#3977BF

secondary

#CAAC8A

accent

#994ADD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3977BF

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

Preview Lab → · Contrast checker → · Palette generator →