#1B557F#1B557F

#1B557F is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.4% C 0.091 H 244.4°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B557F
RGB	rgb(27, 85, 127)
HSL	hsl(205, 65%, 30%)
HSV	hsv(205, 79%, 50%)
CMYK	cmyk(78.7%, 33.1%, 0%, 50.2%)
CIE-LAB	lab(34.52, -3.02, -28.94)
CIE-LCH	lch(34.52, 29.10, 264.04°)
OKLab	oklab(43.36% -0.0393 -0.0821)
OKLCH	oklch(43.36% 0.091 244.4)
XYZ	xyz(7.5298, 8.2614, 21.2723)
Luminance	0.0826 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B557F #7F451B

analogous

#1B7F77 #1B557F #1B237F

triadic

#1B557F #7F1B55 #557F1B

tetradic

#1B557F #771B7F #7F451B #237F1B

square

#1B557F #771B7F #7F451B #237F1B

split-complementary

#1B557F #7F1B23 #7F771B

monochromatic

#06111A #10334D #1B557F #2677B1 #3E96D6

Accessibility & contrast

On white

7.92

#1B557F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1B557F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B557F

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B557F	#FFFFFF	#000000	##FFFFFF
##1B557F	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#425681

Deuteranopia (green-blind)

#344D7E

Tritanopia (blue-blind)

#005F64

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b557f;
/* rgb */ color: rgb(27, 85, 127);
/* oklch */ color: oklch(43.4% 0.091 244.4);

Tailwind

colors: {
  custom: {
    50: '#6784a4',
    500: '#1b557f',
    950: '#000000',
  },
}

SCSS

$custom: #1b557f;
$custom-light: #6784a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b557f",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 127
  },
  "hsl": {
    "h": 205.2,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.43363,
    "c": 0.09103,
    "h": 244.4
  },
  "luminance": 0.08262
}

Semantic roles & 50–950 ramp

primary

#1B557F

secondary

#B37243

accent

#8640E8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B557F

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

Preview Lab → · Contrast checker → · Palette generator →