#374E8A#374E8A

#374E8A is a dark, moderate blue. Relative luminance 0.081; OKLCH L 43.6% C 0.103 H 266.4°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#374E8A
RGB	rgb(55, 78, 138)
HSL	hsl(223, 43%, 38%)
HSV	hsv(223, 60%, 54%)
CMYK	cmyk(60.1%, 43.5%, 0%, 45.9%)
CIE-LAB	lab(34.18, 10.63, -36.17)
CIE-LCH	lch(34.18, 37.70, 286.38°)
OKLab	oklab(43.63% -0.0065 -0.1029)
OKLCH	oklch(43.63% 0.103 266.4)
XYZ	xyz(8.8858, 8.0953, 25.1341)
Luminance	0.0810 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#374E8A #8A7337

analogous

#37788A #374E8A #49378A

triadic

#374E8A #8A374E #4E8A37

tetradic

#374E8A #8A3778 #8A7337 #378A49

square

#374E8A #8A3778 #8A7337 #378A49

split-complementary

#374E8A #8A4937 #788A37

monochromatic

#141D32 #26355E #374E8A #4867B6 #748BC8

Accessibility & contrast

On white

8.02

#374E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#374E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #374E8A

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##374E8A	#FFFFFF	#000000	##FFFFFF
##374E8A	1.00	8.02	2.62	8.02
#FFFFFF	8.02	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34548C

Deuteranopia (green-blind)

#284D89

Tritanopia (blue-blind)

#005B65

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #374e8a;
/* rgb */ color: rgb(55, 78, 138);
/* oklch */ color: oklch(43.6% 0.103 266.4);

Tailwind

colors: {
  custom: {
    50: '#757fac',
    500: '#374e8a',
    950: '#000000',
  },
}

SCSS

$custom: #374e8a;
$custom-light: #757fac;
$custom-dark: #000000;

JSON

{
  "hex": "#374e8a",
  "rgb": {
    "r": 55,
    "g": 78,
    "b": 138
  },
  "hsl": {
    "h": 223.373,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.43628,
    "c": 0.1031,
    "h": 266.4
  },
  "luminance": 0.08096
}

Semantic roles & 50–950 ramp

primary

#374E8A

secondary

#B09E6D

accent

#B055D3

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#090A10

muted

#7B7C7F

Preview Lab

Preview with #374E8A

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

Preview Lab → · Contrast checker → · Palette generator →