#1B558B#1B558B

#1B558B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.1% C 0.107 H 250.4°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B558B
RGB	rgb(27, 85, 139)
HSL	hsl(209, 67%, 33%)
HSV	hsv(209, 81%, 55%)
CMYK	cmyk(80.6%, 38.8%, 0%, 45.5%)
CIE-LAB	lab(35.19, 1.71, -35.25)
CIE-LCH	lch(35.19, 35.29, 272.78°)
OKLab	oklab(44.11% -0.0358 -0.1005)
OKLCH	oklch(44.11% 0.107 250.4)
XYZ	xyz(8.3589, 8.5931, 25.6392)
Luminance	0.0859 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B558B #8B511B

analogous

#1B8B89 #1B558B #1B1D8B

triadic

#1B558B #8B1B55 #558B1B

tetradic

#1B558B #891B8B #8B511B #1D8B1B

square

#1B558B #891B8B #8B511B #1D8B1B

split-complementary

#1B558B #8B1B1D #8B891B

monochromatic

#071625 #113658 #1B558B #2574BE #4593DB

Accessibility & contrast

On white

7.72

#1B558B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1B558B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B558B

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B558B	#FFFFFF	#000000	##FFFFFF
##1B558B	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B588D

Deuteranopia (green-blind)

#2A4E8A

Tritanopia (blue-blind)

#006269

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b558b;
/* rgb */ color: rgb(27, 85, 139);
/* oklch */ color: oklch(44.1% 0.107 250.4);

Tailwind

colors: {
  custom: {
    50: '#6a84ad',
    500: '#1b558b',
    950: '#000000',
  },
}

SCSS

$custom: #1b558b;
$custom-light: #6a84ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b558b",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 208.929,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.44106,
    "c": 0.1067,
    "h": 250.4
  },
  "luminance": 0.08594
}

Semantic roles & 50–950 ramp

primary

#1B558B

secondary

#BC7F45

accent

#913DEA

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B558B

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

Preview Lab → · Contrast checker → · Palette generator →