#3770CA#3770CA

#3770CA is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.4% C 0.152 H 259.3°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3770CA
RGB	rgb(55, 112, 202)
HSL	hsl(217, 58%, 50%)
HSV	hsv(217, 73%, 79%)
CMYK	cmyk(72.8%, 44.6%, 0%, 20.8%)
CIE-LAB	lab(47.83, 12.13, -52.19)
CIE-LCH	lch(47.83, 53.58, 283.09°)
OKLab	oklab(55.4% -0.0283 -0.1495)
OKLCH	oklch(55.4% 0.152 259.3)
XYZ	xyz(18.0265, 16.6629, 58.1319)
Luminance	0.1666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770CA #CA9137

analogous

#37B9CA #3770CA #4737CA

triadic

#3770CA #CA3770 #70CA37

tetradic

#3770CA #CA37B9 #CA9137 #37CA47

square

#3770CA #CA37B9 #CA9137 #37CA47

split-complementary

#3770CA #CA4737 #B9CA37

monochromatic

#1C3B6A #29559B #3770CA #6793D7 #98B5E4

Accessibility & contrast

On white

4.85

#3770CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#3770CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770CA

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770CA	#FFFFFF	#000000	##FFFFFF
##3770CA	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4379CD

Deuteranopia (green-blind)

#256BC8

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3770ca;
/* rgb */ color: rgb(55, 112, 202);
/* oklch */ color: oklch(55.4% 0.152 259.3);

Tailwind

colors: {
  custom: {
    50: '#8098db',
    500: '#3770ca',
    950: '#000000',
  },
}

SCSS

$custom: #3770ca;
$custom-light: #8098db;
$custom-dark: #000000;

JSON

{
  "hex": "#3770ca",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 202
  },
  "hsl": {
    "h": 216.735,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.55398,
    "c": 0.15212,
    "h": 259.3
  },
  "luminance": 0.16665
}

Semantic roles & 50–950 ramp

primary

#3770CA

secondary

#CFB68E

accent

#A546E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3770CA

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

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