#1B375A#1B375A

#1B375A is a dark, moderate cyan. Relative luminance 0.037; OKLCH L 33.4% C 0.071 H 255.0°. Best body text is #FFFFFF at 12.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B375A
RGB	rgb(27, 55, 90)
HSL	hsl(213, 54%, 23%)
HSV	hsv(213, 70%, 35%)
CMYK	cmyk(70%, 38.9%, 0%, 64.7%)
CIE-LAB	lab(22.66, 2.23, -24.15)
CIE-LCH	lch(22.66, 24.25, 275.28°)
OKLab	oklab(33.37% -0.0183 -0.0685)
OKLCH	oklch(33.37% 0.071 255)
XYZ	xyz(3.6630, 3.7032, 10.1926)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B375A #5A3E1B

analogous

#1B565A #1B375A #1E1B5A

triadic

#1B375A #5A1B37 #375A1B

tetradic

#1B375A #5A1B56 #5A3E1B #1B5A1E

square

#1B375A #5A1B56 #5A3E1B #1B5A1E

split-complementary

#1B375A #5A1E1B #565A1B

monochromatic

#070E18 #0D1A2B #1B375A #295489 #3771B8

Accessibility & contrast

On white

12.06

#1B375A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1B375A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B375A

12.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B375A	#FFFFFF	#000000	##FFFFFF
##1B375A	1.00	12.06	1.74	12.06
#FFFFFF	12.06	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28395B

Deuteranopia (green-blind)

#1F3359

Tritanopia (blue-blind)

#003F44

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b375a;
/* rgb */ color: rgb(27, 55, 90);
/* oklch */ color: oklch(33.4% 0.071 255.0);

Tailwind

colors: {
  custom: {
    50: '#5f6d89',
    500: '#1b375a',
    950: '#000000',
  },
}

SCSS

$custom: #1b375a;
$custom-light: #5f6d89;
$custom-dark: #000000;

JSON

{
  "hex": "#1b375a",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 90
  },
  "hsl": {
    "h": 213.333,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.3337,
    "c": 0.07094,
    "h": 255
  },
  "luminance": 0.03704
}

Semantic roles & 50–950 ramp

primary

#1B375A

secondary

#906D41

accent

#9C4BDD

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #1B375A

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

Preview Lab → · Contrast checker → · Palette generator →