#3977B8#3977B8

#3977B8 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.9% C 0.120 H 251.7°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3977B8
RGB	rgb(57, 119, 184)
HSL	hsl(211, 53%, 47%)
HSV	hsv(211, 69%, 72%)
CMYK	cmyk(69%, 35.3%, 0%, 27.8%)
CIE-LAB	lab(48.91, 1.55, -40.12)
CIE-LCH	lch(48.91, 40.15, 272.21°)
OKLab	oklab(55.93% -0.0376 -0.1139)
OKLCH	oklch(55.93% 0.12 251.7)
XYZ	xyz(16.9327, 17.5224, 47.8279)
Luminance	0.1752 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B8 #B87A39

analogous

#39B6B8 #3977B8 #3B39B8

triadic

#3977B8 #B83977 #77B839

tetradic

#3977B8 #B839B6 #B87A39 #39B83B

square

#3977B8 #B839B6 #B87A39 #39B83B

split-complementary

#3977B8 #B83B39 #B6B839

monochromatic

#1C3B5B #2B5989 #3977B8 #6096CE #8FB5DC

Accessibility & contrast

On white

4.66

#3977B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#3977B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B8

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B8	#FFFFFF	#000000	##FFFFFF
##3977B8	1.00	4.66	4.50	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7BBB

Deuteranopia (green-blind)

#486FB7

Tritanopia (blue-blind)

#00868F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3977b8;
/* rgb */ color: rgb(57, 119, 184);
/* oklch */ color: oklch(55.9% 0.120 251.7);

Tailwind

colors: {
  custom: {
    50: '#7e9dcd',
    500: '#3977b8',
    950: '#000000',
  },
}

SCSS

$custom: #3977b8;
$custom-light: #7e9dcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b8",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 184
  },
  "hsl": {
    "h": 210.709,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.5593,
    "c": 0.11994,
    "h": 251.7
  },
  "luminance": 0.17524
}

Semantic roles & 50–950 ramp

primary

#3977B8

secondary

#C7A786

accent

#964CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B8

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

Preview Lab → · Contrast checker → · Palette generator →