#3770E5#3770E5

#3770E5 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.3% C 0.188 H 262.5°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#3770E5
RGB	rgb(55, 112, 229)
HSL	hsl(220, 77%, 56%)
HSV	hsv(220, 76%, 90%)
CMYK	cmyk(76%, 51.1%, 0%, 10.2%)
CIE-LAB	lab(49.56, 22.09, -64.73)
CIE-LCH	lch(49.56, 68.40, 288.84°)
OKLab	oklab(57.28% -0.0244 -0.1863)
OKLCH	oklch(57.28% 0.188 262.5)
XYZ	xyz(21.5075, 18.0553, 76.4650)
Luminance	0.1806 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770E5 #E5AC37

analogous

#37C7E5 #3770E5 #5537E5

triadic

#3770E5 #E53770 #70E537

tetradic

#3770E5 #E537C7 #E5AC37 #37E555

square

#3770E5 #E537C7 #E5AC37 #37E555

split-complementary

#3770E5 #E55537 #C7E537

monochromatic

#133B8F #1A52C5 #3770E5 #6D97EC #A3BDF3

Accessibility & contrast

On white

4.55

#3770E5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#3770E5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3770E5

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770E5	#FFFFFF	#000000	##000000
##3770E5	1.00	4.55	4.61	4.61
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#227EE9

Deuteranopia (green-blind)

#006EE3

Tritanopia (blue-blind)

#008CA0

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3770e5;
/* rgb */ color: rgb(55, 112, 229);
/* oklch */ color: oklch(57.3% 0.188 262.5);

Tailwind

colors: {
  custom: {
    50: '#8698ee',
    500: '#3770e5',
    950: '#000000',
  },
}

SCSS

$custom: #3770e5;
$custom-light: #8698ee;
$custom-dark: #000000;

JSON

{
  "hex": "#3770e5",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 229
  },
  "hsl": {
    "h": 220.345,
    "s": 76.991,
    "l": 55.686
  },
  "oklch": {
    "l": 0.57279,
    "c": 0.18795,
    "h": 262.5
  },
  "luminance": 0.18058
}

Semantic roles & 50–950 ramp

primary

#3770E5

secondary

#E0C898

accent

#B534F4

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3770E5

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

Preview Lab → · Contrast checker → · Palette generator →