#3781AA#3781AA

#3781AA is a mid, moderate cyan. Relative luminance 0.194; OKLCH L 57.5% C 0.096 H 236.2°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3781AA
RGB	rgb(55, 129, 170)
HSL	hsl(201, 51%, 44%)
HSV	hsv(201, 68%, 67%)
CMYK	cmyk(67.6%, 24.1%, 0%, 33.3%)
CIE-LAB	lab(51.17, -9.59, -28.49)
CIE-LCH	lch(51.17, 30.06, 251.40°)
OKLab	oklab(57.47% -0.0536 -0.08)
OKLCH	oklch(57.47% 0.096 236.2)
XYZ	xyz(16.6787, 19.4132, 40.8906)
Luminance	0.1941 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3781AA #AA6037

analogous

#37AA9A #3781AA #3748AA

triadic

#3781AA #AA3781 #81AA37

tetradic

#3781AA #9A37AA #AA6037 #48AA37

square

#3781AA #9A37AA #AA6037 #48AA37

split-complementary

#3781AA #AA3748 #AA9A37

monochromatic

#193B4E #285E7C #3781AA #56A0C8 #84BAD7

Accessibility & contrast

On white

4.30

#3781AA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#3781AA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781AA

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3781AA	#FFFFFF	#000000	##000000
##3781AA	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E80AC

Deuteranopia (green-blind)

#5E75A9

Tritanopia (blue-blind)

#008C8F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3781aa;
/* rgb */ color: rgb(55, 129, 170);
/* oklch */ color: oklch(57.5% 0.096 236.2);

Tailwind

colors: {
  custom: {
    50: '#7ba5c3',
    500: '#3781aa',
    950: '#000000',
  },
}

SCSS

$custom: #3781aa;
$custom-light: #7ba5c3;
$custom-dark: #000000;

JSON

{
  "hex": "#3781aa",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 170
  },
  "hsl": {
    "h": 201.391,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.57472,
    "c": 0.09633,
    "h": 236.2
  },
  "luminance": 0.19415
}

Semantic roles & 50–950 ramp

primary

#3781AA

secondary

#C1947C

accent

#804DDB

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #3781AA

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

Preview Lab → · Contrast checker → · Palette generator →