#1B379D#1B379D

#1B379D is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.9% C 0.169 H 266.3°. Best body text is #FFFFFF at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#1B379D
RGB	rgb(27, 55, 157)
HSL	hsl(227, 71%, 36%)
HSV	hsv(227, 83%, 62%)
CMYK	cmyk(82.8%, 65%, 0%, 38.4%)
CIE-LAB	lab(27.84, 29.25, -58.10)
CIE-LCH	lch(27.84, 65.04, 296.72°)
OKLab	oklab(38.92% -0.011 -0.1682)
OKLCH	oklch(38.92% 0.169 266.3)
XYZ	xyz(7.9018, 5.3988, 32.5174)
Luminance	0.0540 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B379D #9D811B

analogous

#1B789D #1B379D #401B9D

triadic

#1B379D #9D1B37 #379D1B

tetradic

#1B379D #9D1B78 #9D811B #1B9D40

square

#1B379D #9D1B78 #9D811B #1B9D40

split-complementary

#1B379D #9D401B #789D1B

monochromatic

#091235 #122569 #1B379D #2449D1 #5170E1

Accessibility & contrast

On white

10.10

#1B379D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B379D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B379D

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B379D	#FFFFFF	#000000	##FFFFFF
##1B379D	1.00	10.10	2.08	10.10
#FFFFFF	10.10	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048A0

Deuteranopia (green-blind)

#003C9B

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b379d;
/* rgb */ color: rgb(27, 55, 157);
/* oklch */ color: oklch(38.9% 0.169 266.3);

Tailwind

colors: {
  custom: {
    50: '#706dbb',
    500: '#1b379d',
    950: '#000000',
  },
}

SCSS

$custom: #1b379d;
$custom-light: #706dbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b379d",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 157
  },
  "hsl": {
    "h": 227.077,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38922,
    "c": 0.16857,
    "h": 266.3
  },
  "luminance": 0.054
}

Semantic roles & 50–950 ramp

primary

#1B379D

secondary

#C4AB50

accent

#C73AED

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B379D

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

Preview Lab → · Contrast checker → · Palette generator →