#3742BC#3742BC

#3742BC is a mid, vivid blue. Relative luminance 0.083; OKLCH L 45.2% C 0.189 H 272.2°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#3742BC
RGB	rgb(55, 66, 188)
HSL	hsl(235, 55%, 48%)
HSV	hsv(235, 71%, 74%)
CMYK	cmyk(70.7%, 64.9%, 0%, 26.3%)
CIE-LAB	lab(34.68, 36.49, -65.38)
CIE-LCH	lch(34.68, 74.87, 299.17°)
OKLab	oklab(45.16% 0.0074 -0.1889)
OKLCH	oklch(45.16% 0.189 272.2)
XYZ	xyz(12.5978, 8.3383, 48.5127)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3742BC #BCB137

analogous

#3784BC #3742BC #6F37BC

triadic

#3742BC #BC3742 #42BC37

tetradic

#3742BC #BC3784 #BCB137 #37BC6F

square

#3742BC #BC3784 #BCB137 #37BC6F

split-complementary

#3742BC #BC6F37 #84BC37

monochromatic

#1B215D #29318D #3742BC #6069D0 #8F96DE

Accessibility & contrast

On white

7.87

#3742BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3742BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3742BC

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3742BC	#FFFFFF	#000000	##FFFFFF
##3742BC	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C0

Deuteranopia (green-blind)

#004BBA

Tritanopia (blue-blind)

#006279

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3742bc;
/* rgb */ color: rgb(55, 66, 188);
/* oklch */ color: oklch(45.2% 0.189 272.2);

Tailwind

colors: {
  custom: {
    50: '#8076d1',
    500: '#3742bc',
    950: '#000000',
  },
}

SCSS

$custom: #3742bc;
$custom-light: #8076d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3742bc",
  "rgb": {
    "r": 55,
    "g": 66,
    "b": 188
  },
  "hsl": {
    "h": 235.038,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.45162,
    "c": 0.18901,
    "h": 272.2
  },
  "luminance": 0.08339
}

Semantic roles & 50–950 ramp

primary

#3742BC

secondary

#C9C386

accent

#D24ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3742BC

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

Preview Lab → · Contrast checker → · Palette generator →