#374F78#374F78

#374F78 is a dark, moderate blue. Relative luminance 0.078; OKLCH L 42.8% C 0.075 H 260.7°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#374F78
RGB	rgb(55, 79, 120)
HSL	hsl(218, 37%, 34%)
HSV	hsv(218, 54%, 47%)
CMYK	cmyk(54.2%, 34.2%, 0%, 52.9%)
CIE-LAB	lab(33.48, 3.65, -26.17)
CIE-LCH	lch(33.48, 26.42, 277.94°)
OKLab	oklab(42.76% -0.0121 -0.0737)
OKLCH	oklch(42.76% 0.075 260.7)
XYZ	xyz(7.7606, 7.7597, 18.8545)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#374F78 #786037

analogous

#377078 #374F78 #403778

triadic

#374F78 #78374F #4F7837

tetradic

#374F78 #783770 #786037 #377840

square

#374F78 #783770 #786037 #377840

split-complementary

#374F78 #784037 #707837

monochromatic

#111824 #24334E #374F78 #4A6BA2 #6D8ABC

Accessibility & contrast

On white

8.23

#374F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#374F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #374F78

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##374F78	#FFFFFF	#000000	##FFFFFF
##374F78	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F527A

Deuteranopia (green-blind)

#374C77

Tritanopia (blue-blind)

#17585E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #374f78;
/* rgb */ color: rgb(55, 79, 120);
/* oklch */ color: oklch(42.8% 0.075 260.7);

Tailwind

colors: {
  custom: {
    50: '#72809f',
    500: '#374f78',
    950: '#000000',
  },
}

SCSS

$custom: #374f78;
$custom-light: #72809f;
$custom-dark: #000000;

JSON

{
  "hex": "#374f78",
  "rgb": {
    "r": 55,
    "g": 79,
    "b": 120
  },
  "hsl": {
    "h": 217.846,
    "s": 37.143,
    "l": 34.314
  },
  "oklch": {
    "l": 0.42756,
    "c": 0.07468,
    "h": 260.7
  },
  "luminance": 0.0776
}

Semantic roles & 50–950 ramp

primary

#374F78

secondary

#A58E66

accent

#A35BCD

background

#F7F7F9

surface

#EDEEF2

border

#C8C9CC

text

#080A0E

muted

#7B7C7E

Preview Lab

Preview with #374F78

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

Preview Lab → · Contrast checker → · Palette generator →