#3770C7#3770C7

#3770C7 is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.2% C 0.148 H 258.7°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3770C7
RGB	rgb(55, 112, 199)
HSL	hsl(216, 57%, 50%)
HSV	hsv(216, 72%, 78%)
CMYK	cmyk(72.4%, 43.7%, 0%, 22%)
CIE-LAB	lab(47.65, 11.03, -50.76)
CIE-LCH	lch(47.65, 51.95, 282.26°)
OKLab	oklab(55.2% -0.0289 -0.1452)
OKLCH	oklch(55.2% 0.148 258.7)
XYZ	xyz(17.6748, 16.5222, 56.2794)
Luminance	0.1652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770C7 #C78E37

analogous

#37B8C7 #3770C7 #4637C7

triadic

#3770C7 #C73770 #70C737

tetradic

#3770C7 #C737B8 #C78E37 #37C746

square

#3770C7 #C737B8 #C78E37 #37C746

split-complementary

#3770C7 #C74637 #B8C737

monochromatic

#1C3A67 #2A5597 #3770C7 #6692D5 #96B4E2

Accessibility & contrast

On white

4.88

#3770C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#3770C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770C7

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770C7	#FFFFFF	#000000	##FFFFFF
##3770C7	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4578CA

Deuteranopia (green-blind)

#2A6BC5

Tritanopia (blue-blind)

#008492

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3770c7;
/* rgb */ color: rgb(55, 112, 199);
/* oklch */ color: oklch(55.2% 0.148 258.7);

Tailwind

colors: {
  custom: {
    50: '#8098d8',
    500: '#3770c7',
    950: '#000000',
  },
}

SCSS

$custom: #3770c7;
$custom-light: #8098d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3770c7",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 199
  },
  "hsl": {
    "h": 216.25,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55201,
    "c": 0.1481,
    "h": 258.7
  },
  "luminance": 0.16524
}

Semantic roles & 50–950 ramp

primary

#3770C7

secondary

#CDB48C

accent

#A448E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3770C7

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

Preview Lab → · Contrast checker → · Palette generator →