#1B4573#1B4573

#1B4573 is a dark, moderate cyan. Relative luminance 0.057; OKLCH L 38.6% C 0.091 H 253.0°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B4573
RGB	rgb(27, 69, 115)
HSL	hsl(211, 62%, 28%)
HSV	hsv(211, 77%, 45%)
CMYK	cmyk(76.5%, 40%, 0%, 54.9%)
CIE-LAB	lab(28.71, 2.69, -30.65)
CIE-LCH	lch(28.71, 30.77, 275.01°)
OKLab	oklab(38.58% -0.0267 -0.0873)
OKLCH	oklch(38.58% 0.091 253)
XYZ	xyz(5.6735, 5.7264, 17.0226)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4573 #73491B

analogous

#1B7173 #1B4573 #1D1B73

triadic

#1B4573 #731B45 #45731B

tetradic

#1B4573 #731B71 #73491B #1B731D

square

#1B4573 #731B71 #73491B #1B731D

split-complementary

#1B4573 #731D1B #71731B

monochromatic

#060F19 #0F2741 #1B4573 #2763A5 #3881D0

Accessibility & contrast

On white

9.79

#1B4573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1B4573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4573

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4573	#FFFFFF	#000000	##FFFFFF
##1B4573	1.00	9.79	2.15	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304875

Deuteranopia (green-blind)

#224072

Tritanopia (blue-blind)

#005056

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b4573;
/* rgb */ color: rgb(27, 69, 115);
/* oklch */ color: oklch(38.6% 0.091 253.0);

Tailwind

colors: {
  custom: {
    50: '#64789b',
    500: '#1b4573',
    950: '#000000',
  },
}

SCSS

$custom: #1b4573;
$custom-light: #64789b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4573",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 115
  },
  "hsl": {
    "h": 211.364,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.38578,
    "c": 0.09133,
    "h": 253
  },
  "luminance": 0.05727
}

Semantic roles & 50–950 ramp

primary

#1B4573

secondary

#A87742

accent

#9843E5

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B4573

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

Preview Lab → · Contrast checker → · Palette generator →