#1B4563#1B4563

#1B4563 is a dark, moderate cyan. Relative luminance 0.054; OKLCH L 37.6% C 0.069 H 242.9°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B4563
RGB	rgb(27, 69, 99)
HSL	hsl(205, 57%, 25%)
HSV	hsv(205, 73%, 39%)
CMYK	cmyk(72.7%, 30.3%, 0%, 61.2%)
CIE-LAB	lab(27.82, -3.65, -21.88)
CIE-LCH	lch(27.82, 22.19, 260.53°)
OKLab	oklab(37.58% -0.0317 -0.0618)
OKLCH	oklch(37.58% 0.069 242.9)
XYZ	xyz(4.8314, 5.3896, 12.5876)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4563 #63391B

analogous

#1B635D #1B4563 #1B2163

triadic

#1B4563 #631B45 #45631B

tetradic

#1B4563 #5D1B63 #63391B #21631B

square

#1B4563 #5D1B63 #63391B #21631B

split-complementary

#1B4563 #631B21 #635D1B

monochromatic

#071118 #0E2333 #1B4563 #286793 #3588C3

Accessibility & contrast

On white

10.11

#1B4563 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B4563 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4563

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4563	#FFFFFF	#000000	##FFFFFF
##1B4563	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#374664

Deuteranopia (green-blind)

#2E3F62

Tritanopia (blue-blind)

#004C4F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b4563;
/* rgb */ color: rgb(27, 69, 99);
/* oklch */ color: oklch(37.6% 0.069 242.9);

Tailwind

colors: {
  custom: {
    50: '#61788f',
    500: '#1b4563',
    950: '#000000',
  },
}

SCSS

$custom: #1b4563;
$custom-light: #61788f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4563",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 99
  },
  "hsl": {
    "h": 205,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.37583,
    "c": 0.06941,
    "h": 242.9
  },
  "luminance": 0.0539
}

Semantic roles & 50–950 ramp

primary

#1B4563

secondary

#986641

accent

#8747E0

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#05090C

muted

#7A7B7D

Preview Lab

Preview with #1B4563

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

Preview Lab → · Contrast checker → · Palette generator →