#374BBB#374BBB

#374BBB is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.7% C 0.177 H 270.3°. Best body text is #FFFFFF at 7.28:1 contrast (WCAG AA passes).

Color values

HEX	#374BBB
RGB	rgb(55, 75, 187)
HSL	hsl(231, 55%, 47%)
HSV	hsv(231, 71%, 73%)
CMYK	cmyk(70.6%, 59.9%, 0%, 26.7%)
CIE-LAB	lab(36.80, 30.41, -61.32)
CIE-LCH	lch(36.80, 68.45, 296.38°)
OKLab	oklab(46.7% 0.0009 -0.1769)
OKLCH	oklch(46.7% 0.177 270.3)
XYZ	xyz(13.0582, 9.4309, 48.1362)
Luminance	0.0943 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#374BBB #BBA737

analogous

#378DBB #374BBB #6537BB

triadic

#374BBB #BB374B #4BBB37

tetradic

#374BBB #BB378D #BBA737 #37BB65

square

#374BBB #BB378D #BBA737 #37BB65

split-complementary

#374BBB #BB6537 #8DBB37

monochromatic

#1B255C #29388C #374BBB #5F70D0 #8E9BDE

Accessibility & contrast

On white

7.28

#374BBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#374BBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #374BBB

7.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##374BBB	#FFFFFF	#000000	##FFFFFF
##374BBB	1.00	7.28	2.89	7.28
#FFFFFF	7.28	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DBF

Deuteranopia (green-blind)

#0051B9

Tritanopia (blue-blind)

#00677C

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #374bbb;
/* rgb */ color: rgb(55, 75, 187);
/* oklch */ color: oklch(46.7% 0.177 270.3);

Tailwind

colors: {
  custom: {
    50: '#7f7dd0',
    500: '#374bbb',
    950: '#000000',
  },
}

SCSS

$custom: #374bbb;
$custom-light: #7f7dd0;
$custom-dark: #000000;

JSON

{
  "hex": "#374bbb",
  "rgb": {
    "r": 55,
    "g": 75,
    "b": 187
  },
  "hsl": {
    "h": 230.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.46701,
    "c": 0.17689,
    "h": 270.3
  },
  "luminance": 0.09432
}

Semantic roles & 50–950 ramp

primary

#374BBB

secondary

#C9BE85

accent

#C74ADE

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #374BBB

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

Preview Lab → · Contrast checker → · Palette generator →