#3781DA#3781DA

#3781DA is a mid, vivid cyan. Relative luminance 0.216; OKLCH L 60.1% C 0.154 H 255.0°. Best body text is #000000 at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#3781DA
RGB	rgb(55, 129, 218)
HSL	hsl(213, 69%, 54%)
HSV	hsv(213, 75%, 85%)
CMYK	cmyk(74.8%, 40.8%, 0%, 14.5%)
CIE-LAB	lab(53.57, 7.48, -52.10)
CIE-LCH	lch(53.57, 52.64, 278.17°)
OKLab	oklab(60.15% -0.04 -0.1489)
OKLCH	oklch(60.15% 0.154 255)
XYZ	xyz(22.0760, 21.5722, 69.3164)
Luminance	0.2157 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781DA #DA9037

analogous

#37D2DA #3781DA #3E37DA

triadic

#3781DA #DA3781 #81DA37

tetradic

#3781DA #DA37D2 #DA9037 #37DA3E

square

#3781DA #DA37D2 #DA9037 #37DA3E

split-complementary

#3781DA #DA3E37 #D2DA37

monochromatic

#18477F #2163B3 #3781DA #6BA2E4 #9EC2ED

Accessibility & contrast

On white

3.95

#3781DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.32

#3781DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781DA

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781DA	#FFFFFF	#000000	##000000
##3781DA	1.00	3.95	5.32	5.32
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.32	21.00	1.00	1.00
##000000	5.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5688DE

Deuteranopia (green-blind)

#3B79D8

Tritanopia (blue-blind)

#0096A3

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3781da;
/* rgb */ color: rgb(55, 129, 218);
/* oklch */ color: oklch(60.1% 0.154 255.0);

Tailwind

colors: {
  custom: {
    50: '#83a5e6',
    500: '#3781da',
    950: '#000000',
  },
}

SCSS

$custom: #3781da;
$custom-light: #83a5e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3781da",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 218
  },
  "hsl": {
    "h": 212.761,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.60146,
    "c": 0.15416,
    "h": 255
  },
  "luminance": 0.21575
}

Semantic roles & 50–950 ramp

primary

#3781DA

secondary

#D9BA93

accent

#9C3CEC

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0C0F16

muted

#7D7F84

Preview Lab

Preview with #3781DA

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

Preview Lab → · Contrast checker → · Palette generator →