#3770B1#3770B1

#3770B1 is a mid, moderate cyan. Relative luminance 0.156; OKLCH L 53.8% C 0.119 H 253.4°. Best body text is #FFFFFF at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#3770B1
RGB	rgb(55, 112, 177)
HSL	hsl(212, 53%, 45%)
HSV	hsv(212, 69%, 69%)
CMYK	cmyk(68.9%, 36.7%, 0%, 30.6%)
CIE-LAB	lab(46.41, 3.00, -40.02)
CIE-LCH	lch(46.41, 40.13, 274.29°)
OKLab	oklab(53.83% -0.0338 -0.1137)
OKLCH	oklch(53.83% 0.119 253.4)
XYZ	xyz(15.3026, 15.5733, 43.7859)
Luminance	0.1557 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770B1 #B17837

analogous

#37ADB1 #3770B1 #3B37B1

triadic

#3770B1 #B13770 #70B137

tetradic

#3770B1 #B137AD #B17837 #37B13B

square

#3770B1 #B137AD #B17837 #37B13B

split-complementary

#3770B1 #B13B37 #ADB137

monochromatic

#1A3554 #285282 #3770B1 #5A8FCC #88AFDA

Accessibility & contrast

On white

5.10

#3770B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.11

#3770B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770B1

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770B1	#FFFFFF	#000000	##FFFFFF
##3770B1	1.00	5.10	4.11	5.10
#FFFFFF	5.10	1.00	21.00	1.00
#000000	4.11	21.00	1.00	21.00
##FFFFFF	5.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5374B4

Deuteranopia (green-blind)

#4169B0

Tritanopia (blue-blind)

#007F88

Achromatopsia (no color)

#6E6E6E

Design tokens & code

CSS

--color: #3770b1;
/* rgb */ color: rgb(55, 112, 177);
/* oklch */ color: oklch(53.8% 0.119 253.4);

Tailwind

colors: {
  custom: {
    50: '#7c98c8',
    500: '#3770b1',
    950: '#000000',
  },
}

SCSS

$custom: #3770b1;
$custom-light: #7c98c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3770b1",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 177
  },
  "hsl": {
    "h": 211.967,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.53832,
    "c": 0.11867,
    "h": 253.4
  },
  "luminance": 0.15575
}

Semantic roles & 50–950 ramp

primary

#3770B1

secondary

#C4A480

accent

#994CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0D13

muted

#7C7E82

Preview Lab

Preview with #3770B1

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

Preview Lab → · Contrast checker → · Palette generator →