#374C99#374C99

#374C99 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.2% C 0.128 H 269.2°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#374C99
RGB	rgb(55, 76, 153)
HSL	hsl(227, 47%, 41%)
HSV	hsv(227, 64%, 60%)
CMYK	cmyk(64.1%, 50.3%, 0%, 40%)
CIE-LAB	lab(34.56, 17.39, -44.69)
CIE-LCH	lch(34.56, 47.95, 291.26°)
OKLab	oklab(44.22% -0.0019 -0.128)
OKLCH	oklch(44.22% 0.128 269.2)
XYZ	xyz(9.9078, 8.2802, 31.2069)
Luminance	0.0828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#374C99 #998437

analogous

#377D99 #374C99 #533799

triadic

#374C99 #99374C #4C9937

tetradic

#374C99 #99377D #998437 #379953

square

#374C99 #99377D #998437 #379953

split-complementary

#374C99 #995337 #7D9937

monochromatic

#171F3F #27366C #374C99 #4E66BF #7B8DD0

Accessibility & contrast

On white

7.91

#374C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#374C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #374C99

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##374C99	#FFFFFF	#000000	##FFFFFF
##374C99	1.00	7.91	2.66	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23569C

Deuteranopia (green-blind)

#0C4D97

Tritanopia (blue-blind)

#005E6B

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #374c99;
/* rgb */ color: rgb(55, 76, 153);
/* oklch */ color: oklch(44.2% 0.128 269.2);

Tailwind

colors: {
  custom: {
    50: '#787db7',
    500: '#374c99',
    950: '#000000',
  },
}

SCSS

$custom: #374c99;
$custom-light: #787db7;
$custom-dark: #000000;

JSON

{
  "hex": "#374c99",
  "rgb": {
    "r": 55,
    "g": 76,
    "b": 153
  },
  "hsl": {
    "h": 227.143,
    "s": 47.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.44225,
    "c": 0.12798,
    "h": 269.2
  },
  "luminance": 0.08281
}

Semantic roles & 50–950 ramp

primary

#374C99

secondary

#B9AA73

accent

#BA51D7

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0911

muted

#7C7B80

Preview Lab

Preview with #374C99

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

Preview Lab → · Contrast checker → · Palette generator →