#3781CA#3781CA

#3781CA is a mid, vivid cyan. Relative luminance 0.208; OKLCH L 59.2% C 0.134 H 250.9°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#3781CA
RGB	rgb(55, 129, 202)
HSL	hsl(210, 58%, 50%)
HSV	hsv(210, 73%, 79%)
CMYK	cmyk(72.8%, 36.1%, 0%, 20.8%)
CIE-LAB	lab(52.70, 1.67, -44.43)
CIE-LCH	lch(52.70, 44.46, 272.16°)
OKLab	oklab(59.19% -0.0438 -0.1264)
OKLCH	oklch(59.19% 0.134 250.9)
XYZ	xyz(20.0825, 20.7748, 58.8172)
Luminance	0.2078 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781CA #CA8037

analogous

#37CACA #3781CA #3737CA

triadic

#3781CA #CA3781 #81CA37

tetradic

#3781CA #CA37CA #CA8037 #37CA37

square

#3781CA #CA37CA #CA8037 #37CA37

split-complementary

#3781CA #CA3737 #CACA37

monochromatic

#1C446A #29629B #3781CA #679FD7 #98BEE4

Accessibility & contrast

On white

4.07

#3781CA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#3781CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781CA

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781CA	#FFFFFF	#000000	##000000
##3781CA	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6085CD

Deuteranopia (green-blind)

#4A78C9

Tritanopia (blue-blind)

#00929C

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3781ca;
/* rgb */ color: rgb(55, 129, 202);
/* oklch */ color: oklch(59.2% 0.134 250.9);

Tailwind

colors: {
  custom: {
    50: '#80a5da',
    500: '#3781ca',
    950: '#000000',
  },
}

SCSS

$custom: #3781ca;
$custom-light: #80a5da;
$custom-dark: #000000;

JSON

{
  "hex": "#3781ca",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 202
  },
  "hsl": {
    "h": 209.796,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.59186,
    "c": 0.13377,
    "h": 250.9
  },
  "luminance": 0.20777
}

Semantic roles & 50–950 ramp

primary

#3781CA

secondary

#CFAE8E

accent

#9346E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3781CA

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

Preview Lab → · Contrast checker → · Palette generator →