#1B536B#1B536B

#1B536B is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 41.7% C 0.070 H 230.3°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B536B
RGB	rgb(27, 83, 107)
HSL	hsl(198, 60%, 26%)
HSV	hsv(198, 75%, 42%)
CMYK	cmyk(74.8%, 22.4%, 0%, 58%)
CIE-LAB	lab(32.88, -9.42, -19.08)
CIE-LCH	lch(32.88, 21.28, 243.72°)
OKLab	oklab(41.73% -0.0444 -0.0535)
OKLCH	oklch(41.73% 0.07 230.3)
XYZ	xyz(6.1980, 7.4804, 15.0243)
Luminance	0.0748 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B536B #6B331B

analogous

#1B6B5B #1B536B #1B2B6B

triadic

#1B536B #6B1B53 #536B1B

tetradic

#1B536B #5B1B6B #6B331B #2B6B1B

square

#1B536B #5B1B6B #6B331B #2B6B1B

split-complementary

#1B536B #6B1B2B #6B5B1B

monochromatic

#061318 #0F2D3A #1B536B #27799C #359ECC

Accessibility & contrast

On white

8.41

#1B536B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1B536B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B536B

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B536B	#FFFFFF	#000000	##FFFFFF
##1B536B	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#47526C

Deuteranopia (green-blind)

#3C4A6B

Tritanopia (blue-blind)

#005A5B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b536b;
/* rgb */ color: rgb(27, 83, 107);
/* oklch */ color: oklch(41.7% 0.070 230.3);

Tailwind

colors: {
  custom: {
    50: '#638395',
    500: '#1b536b',
    950: '#000000',
  },
}

SCSS

$custom: #1b536b;
$custom-light: #638395;
$custom-dark: #000000;

JSON

{
  "hex": "#1b536b",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 107
  },
  "hsl": {
    "h": 198,
    "s": 59.701,
    "l": 26.275
  },
  "oklch": {
    "l": 0.41731,
    "c": 0.06958,
    "h": 230.3
  },
  "luminance": 0.07481
}

Semantic roles & 50–950 ramp

primary

#1B536B

secondary

#A05E42

accent

#7445E3

background

#F6F8F9

surface

#EBEFF1

border

#C6CACB

text

#060A0D

muted

#7A7C7E

Preview Lab

Preview with #1B536B

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

Preview Lab → · Contrast checker → · Palette generator →