#3748AA#3748AA

#3748AA is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.7% C 0.157 H 271.1°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#3748AA
RGB	rgb(55, 72, 170)
HSL	hsl(231, 51%, 44%)
HSV	hsv(231, 68%, 67%)
CMYK	cmyk(67.6%, 57.6%, 0%, 33.3%)
CIE-LAB	lab(34.70, 26.21, -54.68)
CIE-LCH	lch(34.70, 60.64, 295.61°)
OKLab	oklab(44.72% 0.0031 -0.1574)
OKLCH	oklch(44.72% 0.157 271.1)
XYZ	xyz(11.1462, 8.3482, 39.0464)
Luminance	0.0835 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748AA #AA9937

analogous

#3782AA #3748AA #5F37AA

triadic

#3748AA #AA3748 #48AA37

tetradic

#3748AA #AA3782 #AA9937 #37AA5F

square

#3748AA #AA3782 #AA9937 #37AA5F

split-complementary

#3748AA #AA5F37 #82AA37

monochromatic

#19214E #28347C #3748AA #5667C8 #8490D7

Accessibility & contrast

On white

7.87

#3748AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3748AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748AA

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748AA	#FFFFFF	#000000	##FFFFFF
##3748AA	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)

#0057AD

Deuteranopia (green-blind)

#004DA8

Tritanopia (blue-blind)

#006072

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3748aa;
/* rgb */ color: rgb(55, 72, 170);
/* oklch */ color: oklch(44.7% 0.157 271.1);

Tailwind

colors: {
  custom: {
    50: '#7c7ac4',
    500: '#3748aa',
    950: '#000000',
  },
}

SCSS

$custom: #3748aa;
$custom-light: #7c7ac4;
$custom-dark: #000000;

JSON

{
  "hex": "#3748aa",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 170
  },
  "hsl": {
    "h": 231.13,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.44717,
    "c": 0.15744,
    "h": 271.1
  },
  "luminance": 0.08349
}

Semantic roles & 50–950 ramp

primary

#3748AA

secondary

#C1B77C

accent

#C64DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3748AA

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

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