#2F379B#2F379B

#2F379B is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.7% C 0.160 H 273.1°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#2F379B
RGB	rgb(47, 55, 155)
HSL	hsl(236, 53%, 40%)
HSV	hsv(236, 70%, 61%)
CMYK	cmyk(69.7%, 64.5%, 0%, 39.2%)
CIE-LAB	lab(28.65, 30.73, -55.52)
CIE-LCH	lch(28.65, 63.45, 298.96°)
OKLab	oklab(39.73% 0.0086 -0.1602)
OKLCH	oklch(39.73% 0.16 273.1)
XYZ	xyz(8.4529, 5.7025, 31.6592)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F379B #9B932F

analogous

#2F6D9B #2F379B #5D2F9B

triadic

#2F379B #9B2F37 #379B2F

tetradic

#2F379B #9B2F6D #9B932F #2F9B5D

square

#2F379B #9B2F6D #9B932F #2F9B5D

split-complementary

#2F379B #9B5D2F #6D9B2F

monochromatic

#13163D #21266C #2F379B #424BC6 #7178D4

Accessibility & contrast

On white

9.81

#2F379B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#2F379B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F379B

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F379B	#FFFFFF	#000000	##FFFFFF
##2F379B	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005164

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2f379b;
/* rgb */ color: rgb(47, 55, 155);
/* oklch */ color: oklch(39.7% 0.160 273.1);

Tailwind

colors: {
  custom: {
    50: '#766eb9',
    500: '#2f379b',
    950: '#000000',
  },
}

SCSS

$custom: #2f379b;
$custom-light: #766eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#2f379b",
  "rgb": {
    "r": 47,
    "g": 55,
    "b": 155
  },
  "hsl": {
    "h": 235.556,
    "s": 53.465,
    "l": 39.608
  },
  "oklch": {
    "l": 0.39729,
    "c": 0.16046,
    "h": 273.1
  },
  "luminance": 0.05703
}

Semantic roles & 50–950 ramp

primary

#2F379B

secondary

#BBB56A

accent

#D24BDD

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2F379B

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

Preview Lab → · Contrast checker → · Palette generator →