#3770BF#3770BF

#3770BF is a mid, vivid cyan. Relative luminance 0.162; OKLCH L 54.7% C 0.137 H 257.2°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#3770BF
RGB	rgb(55, 112, 191)
HSL	hsl(215, 55%, 48%)
HSV	hsv(215, 71%, 75%)
CMYK	cmyk(71.2%, 41.4%, 0%, 25.1%)
CIE-LAB	lab(47.18, 8.09, -46.91)
CIE-LCH	lch(47.18, 47.60, 279.79°)
OKLab	oklab(54.69% -0.0305 -0.1339)
OKLCH	oklch(54.69% 0.137 257.2)
XYZ	xyz(16.7703, 16.1604, 51.5155)
Luminance	0.1616 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770BF #BF8637

analogous

#37B4BF #3770BF #4237BF

triadic

#3770BF #BF3770 #70BF37

tetradic

#3770BF #BF37B4 #BF8637 #37BF42

square

#3770BF #BF37B4 #BF8637 #37BF42

split-complementary

#3770BF #BF4237 #B4BF37

monochromatic

#1C3860 #29548F #3770BF #6291D2 #91B2DF

Accessibility & contrast

On white

4.96

#3770BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#3770BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770BF

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770BF	#FFFFFF	#000000	##FFFFFF
##3770BF	1.00	4.96	4.23	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B77C2

Deuteranopia (green-blind)

#346ABD

Tritanopia (blue-blind)

#00828E

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3770bf;
/* rgb */ color: rgb(55, 112, 191);
/* oklch */ color: oklch(54.7% 0.137 257.2);

Tailwind

colors: {
  custom: {
    50: '#7e98d3',
    500: '#3770bf',
    950: '#000000',
  },
}

SCSS

$custom: #3770bf;
$custom-light: #7e98d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3770bf",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 191
  },
  "hsl": {
    "h": 214.853,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.54687,
    "c": 0.13736,
    "h": 257.2
  },
  "luminance": 0.16162
}

Semantic roles & 50–950 ramp

primary

#3770BF

secondary

#CAAE88

accent

#A049DF

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3770BF

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

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