#3770C5#3770C5

#3770C5 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.1% C 0.145 H 258.4°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3770C5
RGB	rgb(55, 112, 197)
HSL	hsl(216, 56%, 49%)
HSV	hsv(216, 72%, 77%)
CMYK	cmyk(72.1%, 43.1%, 0%, 22.7%)
CIE-LAB	lab(47.53, 10.29, -49.80)
CIE-LCH	lch(47.53, 50.86, 281.68°)
OKLab	oklab(55.07% -0.0293 -0.1424)
OKLCH	oklch(55.07% 0.145 258.4)
XYZ	xyz(17.4441, 16.4299, 55.0644)
Luminance	0.1643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770C5 #C58C37

analogous

#37B7C5 #3770C5 #4537C5

triadic

#3770C5 #C53770 #70C537

tetradic

#3770C5 #C537B7 #C58C37 #37C545

square

#3770C5 #C537B7 #C58C37 #37C545

split-complementary

#3770C5 #C54537 #B7C537

monochromatic

#1C3A65 #2A5595 #3770C5 #6592D4 #95B4E1

Accessibility & contrast

On white

4.90

#3770C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#3770C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770C5

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770C5	#FFFFFF	#000000	##FFFFFF
##3770C5	1.00	4.90	4.29	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4678C8

Deuteranopia (green-blind)

#2D6BC3

Tritanopia (blue-blind)

#008491

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3770c5;
/* rgb */ color: rgb(55, 112, 197);
/* oklch */ color: oklch(55.1% 0.145 258.4);

Tailwind

colors: {
  custom: {
    50: '#7f98d7',
    500: '#3770c5',
    950: '#000000',
  },
}

SCSS

$custom: #3770c5;
$custom-light: #7f98d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3770c5",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 197
  },
  "hsl": {
    "h": 215.915,
    "s": 56.349,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55071,
    "c": 0.14541,
    "h": 258.4
  },
  "luminance": 0.16432
}

Semantic roles & 50–950 ramp

primary

#3770C5

secondary

#CDB28B

accent

#A348E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3770C5

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

Preview Lab → · Contrast checker → · Palette generator →