#1B557D#1B557D

#1B557D is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.2% C 0.089 H 243.2°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#1B557D
RGB	rgb(27, 85, 125)
HSL	hsl(204, 64%, 30%)
HSV	hsv(204, 78%, 49%)
CMYK	cmyk(78.4%, 32%, 0%, 51%)
CIE-LAB	lab(34.42, -3.80, -27.88)
CIE-LCH	lch(34.42, 28.14, 262.23°)
OKLab	oklab(43.25% -0.04 -0.079)
OKLCH	oklch(43.25% 0.089 243.2)
XYZ	xyz(7.4007, 8.2098, 20.5927)
Luminance	0.0821 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B557D #7D431B

analogous

#1B7D74 #1B557D #1B247D

triadic

#1B557D #7D1B55 #557D1B

tetradic

#1B557D #741B7D #7D431B #247D1B

square

#1B557D #741B7D #7D431B #247D1B

split-complementary

#1B557D #7D1B24 #7D741B

monochromatic

#051119 #10334B #1B557D #2677AF #3D97D5

Accessibility & contrast

On white

7.95

#1B557D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1B557D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B557D

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B557D	#FFFFFF	#000000	##FFFFFF
##1B557D	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#42567F

Deuteranopia (green-blind)

#354D7C

Tritanopia (blue-blind)

#005F63

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b557d;
/* rgb */ color: rgb(27, 85, 125);
/* oklch */ color: oklch(43.2% 0.089 243.2);

Tailwind

colors: {
  custom: {
    50: '#6784a3',
    500: '#1b557d',
    950: '#000000',
  },
}

SCSS

$custom: #1b557d;
$custom-light: #6784a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b557d",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 125
  },
  "hsl": {
    "h": 204.49,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.43245,
    "c": 0.08853,
    "h": 243.2
  },
  "luminance": 0.08211
}

Semantic roles & 50–950 ramp

primary

#1B557D

secondary

#B17043

accent

#8540E7

background

#F6F8FA

surface

#EBEFF3

border

#C6CACD

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B557D

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

Preview Lab → · Contrast checker → · Palette generator →