#3977B5#3977B5

#3977B5 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.8% C 0.116 H 250.7°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3977B5
RGB	rgb(57, 119, 181)
HSL	hsl(210, 52%, 47%)
HSV	hsv(210, 69%, 71%)
CMYK	cmyk(68.5%, 34.3%, 0%, 29%)
CIE-LAB	lab(48.76, 0.48, -38.63)
CIE-LCH	lch(48.76, 38.63, 270.71°)
OKLab	oklab(55.76% -0.0384 -0.1095)
OKLCH	oklch(55.76% 0.116 250.7)
XYZ	xyz(16.6216, 17.3980, 46.1893)
Luminance	0.1740 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B5 #B57739

analogous

#39B5B5 #3977B5 #3939B5

triadic

#3977B5 #B53977 #77B539

tetradic

#3977B5 #B539B5 #B57739 #39B539

square

#3977B5 #B539B5 #B57739 #39B539

split-complementary

#3977B5 #B53939 #B5B539

monochromatic

#1C3A58 #2A5886 #3977B5 #5F96CD #8DB4DB

Accessibility & contrast

On white

4.69

#3977B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3977B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B5

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B5	#FFFFFF	#000000	##FFFFFF
##3977B5	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7AB8

Deuteranopia (green-blind)

#4A6EB4

Tritanopia (blue-blind)

#00868D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3977b5;
/* rgb */ color: rgb(57, 119, 181);
/* oklch */ color: oklch(55.8% 0.116 250.7);

Tailwind

colors: {
  custom: {
    50: '#7d9dcb',
    500: '#3977b5',
    950: '#000000',
  },
}

SCSS

$custom: #3977b5;
$custom-light: #7d9dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b5",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 181
  },
  "hsl": {
    "h": 210,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.55759,
    "c": 0.11608,
    "h": 250.7
  },
  "luminance": 0.174
}

Semantic roles & 50–950 ramp

primary

#3977B5

secondary

#C6A584

accent

#944CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B5

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

Preview Lab → · Contrast checker → · Palette generator →