#1B539F#1B539F

#1B539F is a mid, vivid cyan. Relative luminance 0.089; OKLCH L 45.0% C 0.136 H 257.5°. Best body text is #FFFFFF at 7.54:1 contrast (WCAG AA passes).

Color values

HEX	#1B539F
RGB	rgb(27, 83, 159)
HSL	hsl(215, 71%, 36%)
HSV	hsv(215, 83%, 62%)
CMYK	cmyk(83%, 47.8%, 0%, 37.6%)
CIE-LAB	lab(35.83, 11.05, -46.32)
CIE-LCH	lch(35.83, 47.62, 283.42°)
OKLab	oklab(45.01% -0.0296 -0.1331)
OKLCH	oklch(45.01% 0.136 257.5)
XYZ	xyz(9.8009, 8.9215, 33.9996)
Luminance	0.0892 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B539F #9F671B

analogous

#1B959F #1B539F #251B9F

triadic

#1B539F #9F1B53 #539F1B

tetradic

#1B539F #9F1B95 #9F671B #1B9F25

square

#1B539F #9F1B95 #9F671B #1B9F25

split-complementary

#1B539F #9F251B #959F1B

monochromatic

#091C36 #12386B #1B539F #246ED3 #538FE2

Accessibility & contrast

On white

7.54

#1B539F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#1B539F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B539F

7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B539F	#FFFFFF	#000000	##FFFFFF
##1B539F	1.00	7.54	2.78	7.54
#FFFFFF	7.54	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#285BA2

Deuteranopia (green-blind)

#004F9D

Tritanopia (blue-blind)

#006571

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1b539f;
/* rgb */ color: rgb(27, 83, 159);
/* oklch */ color: oklch(45.0% 0.136 257.5);

Tailwind

colors: {
  custom: {
    50: '#6f82bc',
    500: '#1b539f',
    950: '#000000',
  },
}

SCSS

$custom: #1b539f;
$custom-light: #6f82bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b539f",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 159
  },
  "hsl": {
    "h": 214.545,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.45011,
    "c": 0.13636,
    "h": 257.5
  },
  "luminance": 0.08923
}

Semantic roles & 50–950 ramp

primary

#1B539F

secondary

#C59451

accent

#A23AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1B539F

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

Preview Lab → · Contrast checker → · Palette generator →