#3781BE#3781BE

#3781BE is a mid, moderate cyan. Relative luminance 0.202; OKLCH L 58.5% C 0.119 H 246.7°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#3781BE
RGB	rgb(55, 129, 190)
HSL	hsl(207, 55%, 48%)
HSV	hsv(207, 71%, 75%)
CMYK	cmyk(71.1%, 32.1%, 0%, 25.5%)
CIE-LAB	lab(52.09, -2.62, -38.55)
CIE-LCH	lch(52.09, 38.64, 266.11°)
OKLab	oklab(58.51% -0.0471 -0.1092)
OKLCH	oklch(58.51% 0.119 246.7)
XYZ	xyz(18.7165, 20.2284, 51.6233)
Luminance	0.2023 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781BE #BE7437

analogous

#37BEB7 #3781BE #373EBE

triadic

#3781BE #BE3781 #81BE37

tetradic

#3781BE #B737BE #BE7437 #3EBE37

square

#3781BE #B737BE #BE7437 #3EBE37

split-complementary

#3781BE #BE373E #BEB737

monochromatic

#1C415F #29618F #3781BE #619FD1 #90BBDF

Accessibility & contrast

On white

4.16

#3781BE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#3781BE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781BE

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781BE	#FFFFFF	#000000	##000000
##3781BE	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6583C1

Deuteranopia (green-blind)

#5376BD

Tritanopia (blue-blind)

#009097

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3781be;
/* rgb */ color: rgb(55, 129, 190);
/* oklch */ color: oklch(58.5% 0.119 246.7);

Tailwind

colors: {
  custom: {
    50: '#7ea5d2',
    500: '#3781be',
    950: '#000000',
  },
}

SCSS

$custom: #3781be;
$custom-light: #7ea5d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3781be",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 190
  },
  "hsl": {
    "h": 207.111,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.5851,
    "c": 0.11895,
    "h": 246.7
  },
  "luminance": 0.2023
}

Semantic roles & 50–950 ramp

primary

#3781BE

secondary

#CAA587

accent

#8D49DE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3781BE

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

Preview Lab → · Contrast checker → · Palette generator →