#1B437A#1B437A

#1B437A is a dark, moderate cyan. Relative luminance 0.057; OKLCH L 38.6% C 0.104 H 257.2°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B437A
RGB	rgb(27, 67, 122)
HSL	hsl(215, 64%, 29%)
HSV	hsv(215, 78%, 48%)
CMYK	cmyk(77.9%, 45.1%, 0%, 52.2%)
CIE-LAB	lab(28.52, 6.88, -35.37)
CIE-LCH	lch(28.52, 36.03, 281.01°)
OKLab	oklab(38.57% -0.023 -0.1012)
OKLCH	oklch(38.57% 0.104 257.2)
XYZ	xyz(5.9707, 5.6518, 19.1848)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B437A #7A521B

analogous

#1B737A #1B437A #231B7A

triadic

#1B437A #7A1B43 #437A1B

tetradic

#1B437A #7A1B73 #7A521B #1B7A23

square

#1B437A #7A1B73 #7A521B #1B7A23

split-complementary

#1B437A #7A231B #737A1B

monochromatic

#060E19 #102748 #1B437A #265FAC #3C7CD4

Accessibility & contrast

On white

9.86

#1B437A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1B437A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B437A

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B437A	#FFFFFF	#000000	##FFFFFF
##1B437A	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28487C

Deuteranopia (green-blind)

#163F79

Tritanopia (blue-blind)

#005058

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b437a;
/* rgb */ color: rgb(27, 67, 122);
/* oklch */ color: oklch(38.6% 0.104 257.2);

Tailwind

colors: {
  custom: {
    50: '#6676a1',
    500: '#1b437a',
    950: '#000000',
  },
}

SCSS

$custom: #1b437a;
$custom-light: #6676a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b437a",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 122
  },
  "hsl": {
    "h": 214.737,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.38568,
    "c": 0.10382,
    "h": 257.2
  },
  "luminance": 0.05652
}

Semantic roles & 50–950 ramp

primary

#1B437A

secondary

#AE8143

accent

#A141E7

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #1B437A

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

Preview Lab → · Contrast checker → · Palette generator →