#1B539B#1B539B

#1B539B is a dark, vivid cyan. Relative luminance 0.088; OKLCH L 44.7% C 0.131 H 256.6°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B539B
RGB	rgb(27, 83, 155)
HSL	hsl(214, 70%, 36%)
HSV	hsv(214, 83%, 61%)
CMYK	cmyk(82.6%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(35.57, 9.44, -44.34)
CIE-LCH	lch(35.57, 45.34, 282.02°)
OKLab	oklab(44.72% -0.0303 -0.1273)
OKLCH	oklch(44.72% 0.131 256.6)
XYZ	xyz(9.4595, 8.7849, 32.2011)
Luminance	0.0879 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B539B #9B631B

analogous

#1B939B #1B539B #231B9B

triadic

#1B539B #9B1B53 #539B1B

tetradic

#1B539B #9B1B93 #9B631B #1B9B23

square

#1B539B #9B1B93 #9B631B #1B9B23

split-complementary

#1B539B #9B231B #939B1B

monochromatic

#091B33 #123767 #1B539B #246FCF #508FE0

Accessibility & contrast

On white

7.62

#1B539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#1B539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B539B

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B539B	#FFFFFF	#000000	##FFFFFF
##1B539B	1.00	7.62	2.76	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5A9E

Deuteranopia (green-blind)

#0C4E9A

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1b539b;
/* rgb */ color: rgb(27, 83, 155);
/* oklch */ color: oklch(44.7% 0.131 256.6);

Tailwind

colors: {
  custom: {
    50: '#6e82b9',
    500: '#1b539b',
    950: '#000000',
  },
}

SCSS

$custom: #1b539b;
$custom-light: #6e82b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b539b",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 213.75,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.4472,
    "c": 0.13085,
    "h": 256.6
  },
  "luminance": 0.08786
}

Semantic roles & 50–950 ramp

primary

#1B539B

secondary

#C3904F

accent

#9F3BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1B539B

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

Preview Lab → · Contrast checker → · Palette generator →