#1B558E#1B558E

#1B558E is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.3% C 0.111 H 251.6°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B558E
RGB	rgb(27, 85, 142)
HSL	hsl(210, 68%, 33%)
HSV	hsv(210, 81%, 56%)
CMYK	cmyk(81%, 40.1%, 0%, 44.3%)
CIE-LAB	lab(35.36, 2.91, -36.79)
CIE-LCH	lch(35.36, 36.91, 274.51°)
OKLab	oklab(44.3% -0.035 -0.1051)
OKLCH	oklch(44.3% 0.111 251.6)
XYZ	xyz(8.5811, 8.6820, 26.8095)
Luminance	0.0868 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B558E #8E541B

analogous

#1B8E8D #1B558E #1B1C8E

triadic

#1B558E #8E1B55 #558E1B

tetradic

#1B558E #8D1B8E #8E541B #1C8E1B

square

#1B558E #8D1B8E #8E541B #1C8E1B

split-complementary

#1B558E #8E1B1C #8E8D1B

monochromatic

#071727 #11365B #1B558E #2574C1 #4792DC

Accessibility & contrast

On white

7.67

#1B558E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1B558E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B558E

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B558E	#FFFFFF	#000000	##FFFFFF
##1B558E	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A5990

Deuteranopia (green-blind)

#274E8D

Tritanopia (blue-blind)

#00636A

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b558e;
/* rgb */ color: rgb(27, 85, 142);
/* oklch */ color: oklch(44.3% 0.111 251.6);

Tailwind

colors: {
  custom: {
    50: '#6a84af',
    500: '#1b558e',
    950: '#000000',
  },
}

SCSS

$custom: #1b558e;
$custom-light: #6a84af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b558e",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 142
  },
  "hsl": {
    "h": 209.739,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.443,
    "c": 0.11074,
    "h": 251.6
  },
  "luminance": 0.08683
}

Semantic roles & 50–950 ramp

primary

#1B558E

secondary

#BE8247

accent

#933DEB

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1B558E

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

Preview Lab → · Contrast checker → · Palette generator →