#1B558D#1B558D

#1B558D is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.2% C 0.109 H 251.2°. Best body text is #FFFFFF at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#1B558D
RGB	rgb(27, 85, 141)
HSL	hsl(209, 68%, 33%)
HSV	hsv(209, 81%, 55%)
CMYK	cmyk(80.9%, 39.7%, 0%, 44.7%)
CIE-LAB	lab(35.31, 2.51, -36.28)
CIE-LCH	lch(35.31, 36.37, 273.95°)
OKLab	oklab(44.24% -0.0352 -0.1036)
OKLCH	oklch(44.24% 0.109 251.2)
XYZ	xyz(8.5064, 8.6521, 26.4158)
Luminance	0.0865 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B558D #8D531B

analogous

#1B8D8C #1B558D #1B1C8D

triadic

#1B558D #8D1B55 #558D1B

tetradic

#1B558D #8C1B8D #8D531B #1C8D1B

square

#1B558D #8C1B8D #8D531B #1C8D1B

split-complementary

#1B558D #8D1B1C #8D8C1B

monochromatic

#071726 #11365A #1B558D #2574C0 #4793DC

Accessibility & contrast

On white

7.69

#1B558D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#1B558D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B558D

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B558D	#FFFFFF	#000000	##FFFFFF
##1B558D	1.00	7.69	2.73	7.69
#FFFFFF	7.69	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A598F

Deuteranopia (green-blind)

#284E8C

Tritanopia (blue-blind)

#00626A

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b558d;
/* rgb */ color: rgb(27, 85, 141);
/* oklch */ color: oklch(44.2% 0.109 251.2);

Tailwind

colors: {
  custom: {
    50: '#6a84af',
    500: '#1b558d',
    950: '#000000',
  },
}

SCSS

$custom: #1b558d;
$custom-light: #6a84af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b558d",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 141
  },
  "hsl": {
    "h": 209.474,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.44235,
    "c": 0.10939,
    "h": 251.2
  },
  "luminance": 0.08653
}

Semantic roles & 50–950 ramp

primary

#1B558D

secondary

#BD8146

accent

#923DEB

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B558D

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

Preview Lab → · Contrast checker → · Palette generator →