#1B557E#1B557E

#1B557E is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.3% C 0.090 H 243.8°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#1B557E
RGB	rgb(27, 85, 126)
HSL	hsl(205, 65%, 30%)
HSV	hsv(205, 79%, 49%)
CMYK	cmyk(78.6%, 32.5%, 0%, 50.6%)
CIE-LAB	lab(34.47, -3.41, -28.41)
CIE-LCH	lch(34.47, 28.62, 263.15°)
OKLab	oklab(43.3% -0.0396 -0.0805)
OKLCH	oklch(43.3% 0.09 243.8)
XYZ	xyz(7.4649, 8.2355, 20.9308)
Luminance	0.0824 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B557E #7E441B

analogous

#1B7E75 #1B557E #1B247E

triadic

#1B557E #7E1B55 #557E1B

tetradic

#1B557E #751B7E #7E441B #247E1B

square

#1B557E #751B7E #7E441B #247E1B

split-complementary

#1B557E #7E1B24 #7E751B

monochromatic

#051119 #10334C #1B557E #2677B0 #3E97D6

Accessibility & contrast

On white

7.93

#1B557E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1B557E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B557E

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B557E	#FFFFFF	#000000	##FFFFFF
##1B557E	1.00	7.93	2.65	7.93
#FFFFFF	7.93	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#425680

Deuteranopia (green-blind)

#344D7D

Tritanopia (blue-blind)

#005F64

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b557e;
/* rgb */ color: rgb(27, 85, 126);
/* oklch */ color: oklch(43.3% 0.090 243.8);

Tailwind

colors: {
  custom: {
    50: '#6784a3',
    500: '#1b557e',
    950: '#000000',
  },
}

SCSS

$custom: #1b557e;
$custom-light: #6784a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b557e",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 126
  },
  "hsl": {
    "h": 204.848,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.43304,
    "c": 0.08978,
    "h": 243.8
  },
  "luminance": 0.08236
}

Semantic roles & 50–950 ramp

primary

#1B557E

secondary

#B27143

accent

#8640E8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B557E

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

Preview Lab → · Contrast checker → · Palette generator →