#1B558C#1B558C

#1B558C is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.2% C 0.108 H 250.8°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B558C
RGB	rgb(27, 85, 140)
HSL	hsl(209, 68%, 33%)
HSV	hsv(209, 81%, 55%)
CMYK	cmyk(80.7%, 39.3%, 0%, 45.1%)
CIE-LAB	lab(35.25, 2.11, -35.76)
CIE-LCH	lch(35.25, 35.83, 273.37°)
OKLab	oklab(44.17% -0.0355 -0.102)
OKLCH	oklch(44.17% 0.108 250.8)
XYZ	xyz(8.4323, 8.6225, 26.0257)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B558C #8C521B

analogous

#1B8C8B #1B558C #1B1C8C

triadic

#1B558C #8C1B55 #558C1B

tetradic

#1B558C #8B1B8C #8C521B #1C8C1B

square

#1B558C #8B1B8C #8C521B #1C8C1B

split-complementary

#1B558C #8C1B1C #8C8B1B

monochromatic

#071725 #113659 #1B558C #2574BF #4693DB

Accessibility & contrast

On white

7.71

#1B558C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1B558C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B558C

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B558C	#FFFFFF	#000000	##FFFFFF
##1B558C	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B588E

Deuteranopia (green-blind)

#294E8B

Tritanopia (blue-blind)

#006269

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b558c;
/* rgb */ color: rgb(27, 85, 140);
/* oklch */ color: oklch(44.2% 0.108 250.8);

Tailwind

colors: {
  custom: {
    50: '#6a84ae',
    500: '#1b558c',
    950: '#000000',
  },
}

SCSS

$custom: #1b558c;
$custom-light: #6a84ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b558c",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 140
  },
  "hsl": {
    "h": 209.204,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.4417,
    "c": 0.10805,
    "h": 250.8
  },
  "luminance": 0.08623
}

Semantic roles & 50–950 ramp

primary

#1B558C

secondary

#BD8046

accent

#923DEB

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B558C

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

Preview Lab → · Contrast checker → · Palette generator →