#3771CF#3771CF

#3771CF is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.9% C 0.158 H 259.6°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#3771CF
RGB	rgb(55, 113, 207)
HSL	hsl(217, 61%, 51%)
HSV	hsv(217, 73%, 81%)
CMYK	cmyk(73.4%, 45.4%, 0%, 18.8%)
CIE-LAB	lab(48.42, 13.35, -54.11)
CIE-LCH	lch(48.42, 55.73, 283.86°)
OKLab	oklab(55.95% -0.0283 -0.1551)
OKLCH	oklch(55.95% 0.158 259.6)
XYZ	xyz(18.7391, 17.1254, 61.3373)
Luminance	0.1713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3771CF #CF9537

analogous

#37BDCF #3771CF #4937CF

triadic

#3771CF #CF3771 #71CF37

tetradic

#3771CF #CF37BD #CF9537 #37CF49

square

#3771CF #CF37BD #CF9537 #37CF49

split-complementary

#3771CF #CF4937 #BDCF37

monochromatic

#1B3C71 #2756A2 #3771CF #6894DB #9AB7E7

Accessibility & contrast

On white

4.75

#3771CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3771CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3771CF

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3771CF	#FFFFFF	#000000	##FFFFFF
##3771CF	1.00	4.75	4.43	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#407AD3

Deuteranopia (green-blind)

#1F6CCD

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3771cf;
/* rgb */ color: rgb(55, 113, 207);
/* oklch */ color: oklch(55.9% 0.158 259.6);

Tailwind

colors: {
  custom: {
    50: '#8199de',
    500: '#3771cf',
    950: '#000000',
  },
}

SCSS

$custom: #3771cf;
$custom-light: #8199de;
$custom-dark: #000000;

JSON

{
  "hex": "#3771cf",
  "rgb": {
    "r": 55,
    "g": 113,
    "b": 207
  },
  "hsl": {
    "h": 217.105,
    "s": 61.29,
    "l": 51.373
  },
  "oklch": {
    "l": 0.55948,
    "c": 0.15765,
    "h": 259.6
  },
  "luminance": 0.17127
}

Semantic roles & 50–950 ramp

primary

#3771CF

secondary

#D2B98F

accent

#A743E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3771CF

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

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