#2F378B#2F378B

#2F378B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.3% C 0.138 H 273.8°. Best body text is #FFFFFF at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#2F378B
RGB	rgb(47, 55, 139)
HSL	hsl(235, 49%, 36%)
HSV	hsv(235, 66%, 55%)
CMYK	cmyk(66.2%, 60.4%, 0%, 45.5%)
CIE-LAB	lab(27.30, 24.90, -47.89)
CIE-LCH	lch(27.30, 53.98, 297.48°)
OKLab	oklab(38.31% 0.0091 -0.1378)
OKLCH	oklch(38.31% 0.138 273.8)
XYZ	xyz(7.1971, 5.2002, 25.0455)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F378B #8B832F

analogous

#2F658B #2F378B #552F8B

triadic

#2F378B #8B2F37 #378B2F

tetradic

#2F378B #8B2F65 #8B832F #2F8B55

square

#2F378B #8B2F65 #8B832F #2F8B55

split-complementary

#2F378B #8B552F #658B2F

monochromatic

#101330 #20255D #2F378B #3E49B9 #6871CC

Accessibility & contrast

On white

10.29

#2F378B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#2F378B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F378B

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F378B	#FFFFFF	#000000	##FFFFFF
##2F378B	1.00	10.29	2.04	10.29
#FFFFFF	10.29	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2f378b;
/* rgb */ color: rgb(47, 55, 139);
/* oklch */ color: oklch(38.3% 0.138 273.8);

Tailwind

colors: {
  custom: {
    50: '#736dae',
    500: '#2f378b',
    950: '#000000',
  },
}

SCSS

$custom: #2f378b;
$custom-light: #736dae;
$custom-dark: #000000;

JSON

{
  "hex": "#2f378b",
  "rgb": {
    "r": 47,
    "g": 55,
    "b": 139
  },
  "hsl": {
    "h": 234.783,
    "s": 49.462,
    "l": 36.471
  },
  "oklch": {
    "l": 0.38312,
    "c": 0.13814,
    "h": 273.8
  },
  "luminance": 0.05201
}

Semantic roles & 50–950 ramp

primary

#2F378B

secondary

#B3AC63

accent

#CD4FD9

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #2F378B

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

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