#3977B1#3977B1

#3977B1 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.5% C 0.111 H 249.1°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3977B1
RGB	rgb(57, 119, 177)
HSL	hsl(209, 51%, 46%)
HSV	hsv(209, 68%, 69%)
CMYK	cmyk(67.8%, 32.8%, 0%, 30.6%)
CIE-LAB	lab(48.56, -0.94, -36.63)
CIE-LCH	lch(48.56, 36.64, 268.53°)
OKLab	oklab(55.54% -0.0395 -0.1037)
OKLCH	oklch(55.54% 0.111 249.1)
XYZ	xyz(16.2170, 17.2362, 44.0587)
Luminance	0.1724 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3977B1 #B17339

analogous

#39B1AF #3977B1 #393BB1

triadic

#3977B1 #B13977 #77B139

tetradic

#3977B1 #AF39B1 #B17339 #3BB139

square

#3977B1 #AF39B1 #B17339 #3BB139

split-complementary

#3977B1 #B1393B #B1AF39

monochromatic

#1B3954 #2A5883 #3977B1 #5D95CB #8BB4DA

Accessibility & contrast

On white

4.72

#3977B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3977B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3977B1

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3977B1	#FFFFFF	#000000	##FFFFFF
##3977B1	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7AB3

Deuteranopia (green-blind)

#4D6EB0

Tritanopia (blue-blind)

#00858C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3977b1;
/* rgb */ color: rgb(57, 119, 177);
/* oklch */ color: oklch(55.5% 0.111 249.1);

Tailwind

colors: {
  custom: {
    50: '#7c9dc8',
    500: '#3977b1',
    950: '#000000',
  },
}

SCSS

$custom: #3977b1;
$custom-light: #7c9dc8;
$custom-dark: #000000;

JSON

{
  "hex": "#3977b1",
  "rgb": {
    "r": 57,
    "g": 119,
    "b": 177
  },
  "hsl": {
    "h": 209,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.55535,
    "c": 0.11099,
    "h": 249.1
  },
  "luminance": 0.17238
}

Semantic roles & 50–950 ramp

primary

#3977B1

secondary

#C4A282

accent

#924DDB

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3977B1

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

Preview Lab → · Contrast checker → · Palette generator →