#1B537F#1B537F

#1B537F is a dark, moderate cyan. Relative luminance 0.080; OKLCH L 42.9% C 0.093 H 246.3°. Best body text is #FFFFFF at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B537F
RGB	rgb(27, 83, 127)
HSL	hsl(206, 65%, 30%)
HSV	hsv(206, 79%, 50%)
CMYK	cmyk(78.7%, 34.6%, 0%, 50.2%)
CIE-LAB	lab(33.88, -1.75, -29.96)
CIE-LCH	lch(33.88, 30.01, 266.66°)
OKLab	oklab(42.86% -0.0373 -0.0851)
OKLCH	oklch(42.86% 0.093 246.3)
XYZ	xyz(7.3745, 7.9510, 21.2206)
Luminance	0.0795 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B537F #7F471B

analogous

#1B7F79 #1B537F #1B217F

triadic

#1B537F #7F1B53 #537F1B

tetradic

#1B537F #791B7F #7F471B #217F1B

square

#1B537F #791B7F #7F471B #217F1B

split-complementary

#1B537F #7F1B21 #7F791B

monochromatic

#06111A #10324D #1B537F #2674B1 #3E93D6

Accessibility & contrast

On white

8.11

#1B537F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1B537F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B537F

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B537F	#FFFFFF	#000000	##FFFFFF
##1B537F	1.00	8.11	2.59	8.11
#FFFFFF	8.11	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5581

Deuteranopia (green-blind)

#304B7E

Tritanopia (blue-blind)

#005E63

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b537f;
/* rgb */ color: rgb(27, 83, 127);
/* oklch */ color: oklch(42.9% 0.093 246.3);

Tailwind

colors: {
  custom: {
    50: '#6783a4',
    500: '#1b537f',
    950: '#000000',
  },
}

SCSS

$custom: #1b537f;
$custom-light: #6783a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b537f",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 127
  },
  "hsl": {
    "h": 206.4,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.42857,
    "c": 0.0929,
    "h": 246.3
  },
  "luminance": 0.07952
}

Semantic roles & 50–950 ramp

primary

#1B537F

secondary

#B37443

accent

#8A40E8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B537F

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

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