#3771D0#3771D0

#3771D0 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.0% C 0.159 H 259.8°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3771D0
RGB	rgb(55, 113, 208)
HSL	hsl(217, 62%, 52%)
HSV	hsv(217, 74%, 82%)
CMYK	cmyk(73.6%, 45.7%, 0%, 18.4%)
CIE-LAB	lab(48.48, 13.72, -54.58)
CIE-LCH	lch(48.48, 56.28, 284.10°)
OKLab	oklab(56.02% -0.0282 -0.1565)
OKLCH	oklch(56.02% 0.159 259.8)
XYZ	xyz(18.8617, 17.1745, 61.9832)
Luminance	0.1718 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771D0 #D09637

analogous

#37BDD0 #3771D0 #4A37D0

triadic

#3771D0 #D03771 #71D037

tetradic

#3771D0 #D037BD #D09637 #37D04A

square

#3771D0 #D037BD #D09637 #37D04A

split-complementary

#3771D0 #D04A37 #BDD037

monochromatic

#1B3C72 #2656A3 #3771D0 #6994DC #9AB7E7

Accessibility & contrast

On white

4.73

#3771D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3771D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771D0

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771D0	#FFFFFF	#000000	##FFFFFF
##3771D0	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7BD4

Deuteranopia (green-blind)

#1D6DCE

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3771d0;
/* rgb */ color: rgb(55, 113, 208);
/* oklch */ color: oklch(56.0% 0.159 259.8);

Tailwind

colors: {
  custom: {
    50: '#8199df',
    500: '#3771d0',
    950: '#000000',
  },
}

SCSS

$custom: #3771d0;
$custom-light: #8199df;
$custom-dark: #000000;

JSON

{
  "hex": "#3771d0",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 208
  },
  "hsl": {
    "h": 217.255,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.56015,
    "c": 0.15898,
    "h": 259.8
  },
  "luminance": 0.17177
}

Semantic roles & 50–950 ramp

primary

#3771D0

secondary

#D3BA90

accent

#A843E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3771D0

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

Preview Lab → · Contrast checker → · Palette generator →