#3877B3#3877B3

#3877B3 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.6% C 0.114 H 249.6°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#3877B3
RGB	rgb(56, 119, 179)
HSL	hsl(209, 52%, 46%)
HSV	hsv(209, 69%, 70%)
CMYK	cmyk(68.7%, 33.5%, 0%, 29.8%)
CIE-LAB	lab(48.62, -0.39, -37.69)
CIE-LCH	lch(48.62, 37.69, 269.40°)
OKLab	oklab(55.61% -0.0397 -0.1068)
OKLCH	oklch(55.61% 0.114 249.6)
XYZ	xyz(16.3614, 17.2874, 45.1136)
Luminance	0.1729 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3877B3 #B37438

analogous

#38B3B1 #3877B3 #383AB3

triadic

#3877B3 #B33877 #77B338

tetradic

#3877B3 #B138B3 #B37438 #3AB338

square

#3877B3 #B138B3 #B37438 #3AB338

split-complementary

#3877B3 #B3383A #B3B138

monochromatic

#1B3956 #295884 #3877B3 #5C95CC #8BB4DB

Accessibility & contrast

On white

4.71

#3877B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#3877B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3877B3

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3877B3	#FFFFFF	#000000	##FFFFFF
##3877B3	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7AB6

Deuteranopia (green-blind)

#4B6EB2

Tritanopia (blue-blind)

#00858D

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3877b3;
/* rgb */ color: rgb(56, 119, 179);
/* oklch */ color: oklch(55.6% 0.114 249.6);

Tailwind

colors: {
  custom: {
    50: '#7c9dca',
    500: '#3877b3',
    950: '#000000',
  },
}

SCSS

$custom: #3877b3;
$custom-light: #7c9dca;
$custom-dark: #000000;

JSON

{
  "hex": "#3877b3",
  "rgb": {
    "r": 56,
    "g": 119,
    "b": 179
  },
  "hsl": {
    "h": 209.268,
    "s": 52.34,
    "l": 46.078
  },
  "oklch": {
    "l": 0.55608,
    "c": 0.11394,
    "h": 249.6
  },
  "luminance": 0.17289
}

Semantic roles & 50–950 ramp

primary

#3877B3

secondary

#C5A382

accent

#924CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3877B3

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

Preview Lab → · Contrast checker → · Palette generator →