#1B557C#1B557C

#1B557C is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.2% C 0.087 H 242.5°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B557C
RGB	rgb(27, 85, 124)
HSL	hsl(204, 64%, 30%)
HSV	hsv(204, 78%, 49%)
CMYK	cmyk(78.2%, 31.5%, 0%, 51.4%)
CIE-LAB	lab(34.36, -4.19, -27.34)
CIE-LCH	lch(34.36, 27.66, 261.29°)
OKLab	oklab(43.19% -0.0403 -0.0774)
OKLCH	oklch(43.19% 0.087 242.5)
XYZ	xyz(7.3372, 8.1844, 20.2579)
Luminance	0.0819 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B557C #7C421B

analogous

#1B7C73 #1B557C #1B247C

triadic

#1B557C #7C1B55 #557C1B

tetradic

#1B557C #731B7C #7C421B #247C1B

square

#1B557C #731B7C #7C421B #247C1B

split-complementary

#1B557C #7C1B24 #7C731B

monochromatic

#051119 #10334A #1B557C #2677AE #3D98D5

Accessibility & contrast

On white

7.96

#1B557C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1B557C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B557C

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B557C	#FFFFFF	#000000	##FFFFFF
##1B557C	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#43567E

Deuteranopia (green-blind)

#364D7B

Tritanopia (blue-blind)

#005F63

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b557c;
/* rgb */ color: rgb(27, 85, 124);
/* oklch */ color: oklch(43.2% 0.087 242.5);

Tailwind

colors: {
  custom: {
    50: '#6784a2',
    500: '#1b557c',
    950: '#000000',
  },
}

SCSS

$custom: #1b557c;
$custom-light: #6784a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b557c",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 124
  },
  "hsl": {
    "h": 204.124,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.43187,
    "c": 0.08729,
    "h": 242.5
  },
  "luminance": 0.08185
}

Semantic roles & 50–950 ramp

primary

#1B557C

secondary

#B06F43

accent

#8441E7

background

#F6F8FA

surface

#EBEFF3

border

#C6CACD

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B557C

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

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