#1B537A#1B537A

#1B537A is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.6% C 0.087 H 243.3°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B537A
RGB	rgb(27, 83, 122)
HSL	hsl(205, 64%, 29%)
HSV	hsv(205, 78%, 48%)
CMYK	cmyk(77.9%, 32%, 0%, 52.2%)
CIE-LAB	lab(33.61, -3.70, -27.28)
CIE-LCH	lch(33.61, 27.53, 262.27°)
OKLab	oklab(42.56% -0.0389 -0.0773)
OKLCH	oklch(42.56% 0.087 243.3)
XYZ	xyz(7.0567, 7.8238, 19.5468)
Luminance	0.0783 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B537A #7A421B

analogous

#1B7A72 #1B537A #1B237A

triadic

#1B537A #7A1B53 #537A1B

tetradic

#1B537A #721B7A #7A421B #237A1B

square

#1B537A #721B7A #7A421B #237A1B

split-complementary

#1B537A #7A1B23 #7A721B

monochromatic

#061119 #103148 #1B537A #2675AC #3C95D4

Accessibility & contrast

On white

8.19

#1B537A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#1B537A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B537A

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B537A	#FFFFFF	#000000	##FFFFFF
##1B537A	1.00	8.19	2.57	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#41547C

Deuteranopia (green-blind)

#344B79

Tritanopia (blue-blind)

#005D61

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b537a;
/* rgb */ color: rgb(27, 83, 122);
/* oklch */ color: oklch(42.6% 0.087 243.3);

Tailwind

colors: {
  custom: {
    50: '#6683a0',
    500: '#1b537a',
    950: '#000000',
  },
}

SCSS

$custom: #1b537a;
$custom-light: #6683a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b537a",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 122
  },
  "hsl": {
    "h": 204.632,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.42559,
    "c": 0.08654,
    "h": 243.3
  },
  "luminance": 0.07825
}

Semantic roles & 50–950 ramp

primary

#1B537A

secondary

#AE6F43

accent

#8541E7

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#070A0F

muted

#7A7C7E

Preview Lab

Preview with #1B537A

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

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