#3770CE#3770CE

#3770CE is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.7% C 0.157 H 259.9°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#3770CE
RGB	rgb(55, 112, 206)
HSL	hsl(217, 61%, 51%)
HSV	hsv(217, 73%, 81%)
CMYK	cmyk(73.3%, 45.6%, 0%, 19.2%)
CIE-LAB	lab(48.08, 13.61, -54.09)
CIE-LCH	lch(48.08, 55.77, 284.12°)
OKLab	oklab(55.67% -0.0276 -0.155)
OKLCH	oklch(55.67% 0.157 259.9)
XYZ	xyz(18.5063, 16.8548, 60.6585)
Luminance	0.1686 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770CE #CE9537

analogous

#37BBCE #3770CE #4937CE

triadic

#3770CE #CE3770 #70CE37

tetradic

#3770CE #CE37BB #CE9537 #37CE49

square

#3770CE #CE37BB #CE9537 #37CE49

split-complementary

#3770CE #CE4937 #BBCE37

monochromatic

#1B3B6F #2755A0 #3770CE #6893DA #99B6E6

Accessibility & contrast

On white

4.80

#3770CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#3770CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770CE

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770CE	#FFFFFF	#000000	##FFFFFF
##3770CE	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7AD2

Deuteranopia (green-blind)

#1E6CCC

Tritanopia (blue-blind)

#008695

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3770ce;
/* rgb */ color: rgb(55, 112, 206);
/* oklch */ color: oklch(55.7% 0.157 259.9);

Tailwind

colors: {
  custom: {
    50: '#8198dd',
    500: '#3770ce',
    950: '#000000',
  },
}

SCSS

$custom: #3770ce;
$custom-light: #8198dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3770ce",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 206
  },
  "hsl": {
    "h": 217.351,
    "s": 60.643,
    "l": 51.176
  },
  "oklch": {
    "l": 0.55665,
    "c": 0.15748,
    "h": 259.9
  },
  "luminance": 0.16857
}

Semantic roles & 50–950 ramp

primary

#3770CE

secondary

#D2B98F

accent

#A744E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3770CE

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

Preview Lab → · Contrast checker → · Palette generator →