#3770AA#3770AA

#3770AA is a mid, moderate cyan. Relative luminance 0.153; OKLCH L 53.4% C 0.109 H 250.9°. Best body text is #FFFFFF at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#3770AA
RGB	rgb(55, 112, 170)
HSL	hsl(210, 51%, 44%)
HSV	hsv(210, 68%, 67%)
CMYK	cmyk(67.6%, 34.1%, 0%, 33.3%)
CIE-LAB	lab(46.04, 0.48, -36.51)
CIE-LCH	lch(46.04, 36.51, 270.76°)
OKLab	oklab(53.43% -0.0357 -0.1035)
OKLCH	oklch(53.43% 0.109 250.9)
XYZ	xyz(14.6227, 15.3013, 40.2052)
Luminance	0.1530 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770AA #AA7137

analogous

#37AAAA #3770AA #3837AA

triadic

#3770AA #AA3770 #70AA37

tetradic

#3770AA #AA37AA #AA7137 #37AA38

square

#3770AA #AA37AA #AA7137 #37AA38

split-complementary

#3770AA #AA3837 #AAAA37

monochromatic

#19334E #28527C #3770AA #568FC8 #84ADD7

Accessibility & contrast

On white

5.17

#3770AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.06

#3770AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770AA

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770AA	#FFFFFF	#000000	##FFFFFF
##3770AA	1.00	5.17	4.06	5.17
#FFFFFF	5.17	1.00	21.00	1.00
#000000	4.06	21.00	1.00	21.00
##FFFFFF	5.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5673AC

Deuteranopia (green-blind)

#4668A9

Tritanopia (blue-blind)

#007E85

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3770aa;
/* rgb */ color: rgb(55, 112, 170);
/* oklch */ color: oklch(53.4% 0.109 250.9);

Tailwind

colors: {
  custom: {
    50: '#7a98c3',
    500: '#3770aa',
    950: '#000000',
  },
}

SCSS

$custom: #3770aa;
$custom-light: #7a98c3;
$custom-dark: #000000;

JSON

{
  "hex": "#3770aa",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 170
  },
  "hsl": {
    "h": 210.261,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.53426,
    "c": 0.10948,
    "h": 250.9
  },
  "luminance": 0.15303
}

Semantic roles & 50–950 ramp

primary

#3770AA

secondary

#C19F7C

accent

#954DDB

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0D12

muted

#7C7E81

Preview Lab

Preview with #3770AA

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

Preview Lab → · Contrast checker → · Palette generator →