#1B4063#1B4063

#1B4063 is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.3% C 0.074 H 249.5°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B4063
RGB	rgb(27, 64, 99)
HSL	hsl(209, 57%, 25%)
HSV	hsv(209, 73%, 39%)
CMYK	cmyk(72.7%, 35.4%, 0%, 61.2%)
CIE-LAB	lab(26.16, -0.34, -24.49)
CIE-LCH	lch(26.16, 24.49, 269.20°)
OKLab	oklab(36.28% -0.026 -0.0694)
OKLCH	oklch(36.28% 0.074 249.5)
XYZ	xyz(4.5367, 4.8002, 12.4894)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4063 #633E1B

analogous

#1B6362 #1B4063 #1B1C63

triadic

#1B4063 #631B40 #40631B

tetradic

#1B4063 #621B63 #633E1B #1C631B

square

#1B4063 #621B63 #633E1B #1C631B

split-complementary

#1B4063 #631B1C #63621B

monochromatic

#071018 #0E2133 #1B4063 #285F93 #357EC3

Accessibility & contrast

On white

10.71

#1B4063 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1B4063 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4063

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4063	#FFFFFF	#000000	##FFFFFF
##1B4063	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304264

Deuteranopia (green-blind)

#263B62

Tritanopia (blue-blind)

#00484D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b4063;
/* rgb */ color: rgb(27, 64, 99);
/* oklch */ color: oklch(36.3% 0.074 249.5);

Tailwind

colors: {
  custom: {
    50: '#61748f',
    500: '#1b4063',
    950: '#000000',
  },
}

SCSS

$custom: #1b4063;
$custom-light: #61748f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4063",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 99
  },
  "hsl": {
    "h": 209.167,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.36275,
    "c": 0.0741,
    "h": 249.5
  },
  "luminance": 0.04801
}

Semantic roles & 50–950 ramp

primary

#1B4063

secondary

#986C41

accent

#9247E0

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#05080C

muted

#7A7B7D

Preview Lab

Preview with #1B4063

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

Preview Lab → · Contrast checker → · Palette generator →