#1B376B#1B376B

#1B376B is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.097 H 261.5°. Best body text is #FFFFFF at 11.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B376B
RGB	rgb(27, 55, 107)
HSL	hsl(219, 60%, 26%)
HSV	hsv(219, 75%, 42%)
CMYK	cmyk(74.8%, 48.6%, 0%, 58%)
CIE-LAB	lab(23.76, 9.12, -33.46)
CIE-LCH	lch(23.76, 34.68, 285.24°)
OKLab	oklab(34.57% -0.0143 -0.0959)
OKLCH	oklch(34.57% 0.097 261.5)
XYZ	xyz(4.4711, 4.0265, 14.4486)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B376B #6B4F1B

analogous

#1B5F6B #1B376B #271B6B

triadic

#1B376B #6B1B37 #376B1B

tetradic

#1B376B #6B1B5F #6B4F1B #1B6B27

square

#1B376B #6B1B5F #6B4F1B #1B6B27

split-complementary

#1B376B #6B271B #5F6B1B

monochromatic

#060D18 #0F1E3A #1B376B #27509C #3569CC

Accessibility & contrast

On white

11.63

#1B376B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B376B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B376B

11.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B376B	#FFFFFF	#000000	##FFFFFF
##1B376B	1.00	11.63	1.81	11.63
#FFFFFF	11.63	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C3C6D

Deuteranopia (green-blind)

#0B356A

Tritanopia (blue-blind)

#00434B

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b376b;
/* rgb */ color: rgb(27, 55, 107);
/* oklch */ color: oklch(34.6% 0.097 261.5);

Tailwind

colors: {
  custom: {
    50: '#636d96',
    500: '#1b376b',
    950: '#000000',
  },
}

SCSS

$custom: #1b376b;
$custom-light: #636d96;
$custom-dark: #000000;

JSON

{
  "hex": "#1b376b",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 107
  },
  "hsl": {
    "h": 219,
    "s": 59.701,
    "l": 26.275
  },
  "oklch": {
    "l": 0.34572,
    "c": 0.09692,
    "h": 261.5
  },
  "luminance": 0.04027
}

Semantic roles & 50–950 ramp

primary

#1B376B

secondary

#A07F42

accent

#AC45E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #1B376B

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

Preview Lab → · Contrast checker → · Palette generator →