#1B5871#1B5871

#1B5871 is a dark, moderate cyan. Relative luminance 0.084; OKLCH L 43.4% C 0.073 H 229.5°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B5871
RGB	rgb(27, 88, 113)
HSL	hsl(197, 61%, 27%)
HSV	hsv(197, 76%, 44%)
CMYK	cmyk(76.1%, 22.1%, 0%, 55.7%)
CIE-LAB	lab(34.81, -10.22, -19.83)
CIE-LCH	lch(34.81, 22.31, 242.74°)
OKLab	oklab(43.37% -0.0475 -0.0557)
OKLCH	oklch(43.37% 0.073 229.5)
XYZ	xyz(6.9212, 8.4039, 16.8769)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5871 #71341B

analogous

#1B715F #1B5871 #1B2D71

triadic

#1B5871 #711B58 #58711B

tetradic

#1B5871 #5F1B71 #71341B #2D711B

square

#1B5871 #5F1B71 #71341B #2D711B

split-complementary

#1B5871 #711B2D #715F1B

monochromatic

#061319 #0F3240 #1B5871 #277EA2 #37A3CF

Accessibility & contrast

On white

7.83

#1B5871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#1B5871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5871

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5871	#FFFFFF	#000000	##FFFFFF
##1B5871	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B5772

Deuteranopia (green-blind)

#3F4E71

Tritanopia (blue-blind)

#005F60

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b5871;
/* rgb */ color: rgb(27, 88, 113);
/* oklch */ color: oklch(43.4% 0.073 229.5);

Tailwind

colors: {
  custom: {
    50: '#65879a',
    500: '#1b5871',
    950: '#000000',
  },
}

SCSS

$custom: #1b5871;
$custom-light: #65879a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5871",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 113
  },
  "hsl": {
    "h": 197.442,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.43366,
    "c": 0.07321,
    "h": 229.5
  },
  "luminance": 0.08405
}

Semantic roles & 50–950 ramp

primary

#1B5871

secondary

#A65F42

accent

#7243E5

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#060B0E

muted

#7A7C7E

Preview Lab

Preview with #1B5871

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

Preview Lab → · Contrast checker → · Palette generator →