#3781AB#3781AB

#3781AB is a mid, moderate cyan. Relative luminance 0.195; OKLCH L 57.5% C 0.097 H 236.9°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3781AB
RGB	rgb(55, 129, 171)
HSL	hsl(202, 51%, 44%)
HSV	hsv(202, 68%, 67%)
CMYK	cmyk(67.8%, 24.6%, 0%, 32.9%)
CIE-LAB	lab(51.21, -9.25, -29.00)
CIE-LCH	lch(51.21, 30.44, 252.32°)
OKLab	oklab(57.52% -0.0532 -0.0815)
OKLCH	oklch(57.52% 0.097 236.9)
XYZ	xyz(16.7736, 19.4512, 41.3906)
Luminance	0.1945 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781AB #AB6137

analogous

#37AB9B #3781AB #3747AB

triadic

#3781AB #AB3781 #81AB37

tetradic

#3781AB #9B37AB #AB6137 #47AB37

square

#3781AB #9B37AB #AB6137 #47AB37

split-complementary

#3781AB #AB3747 #AB9B37

monochromatic

#193B4E #285E7D #3781AB #569FC9 #85BAD8

Accessibility & contrast

On white

4.29

#3781AB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#3781AB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781AB

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781AB	#FFFFFF	#000000	##000000
##3781AB	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D80AD

Deuteranopia (green-blind)

#5D75AA

Tritanopia (blue-blind)

#008C8F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3781ab;
/* rgb */ color: rgb(55, 129, 171);
/* oklch */ color: oklch(57.5% 0.097 236.9);

Tailwind

colors: {
  custom: {
    50: '#7ba5c4',
    500: '#3781ab',
    950: '#000000',
  },
}

SCSS

$custom: #3781ab;
$custom-light: #7ba5c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3781ab",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 171
  },
  "hsl": {
    "h": 201.724,
    "s": 51.327,
    "l": 44.314
  },
  "oklch": {
    "l": 0.57521,
    "c": 0.09736,
    "h": 236.9
  },
  "luminance": 0.19453
}

Semantic roles & 50–950 ramp

primary

#3781AB

secondary

#C1957C

accent

#804DDB

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #3781AB

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

Preview Lab → · Contrast checker → · Palette generator →