#1B559F#1B559F

#1B559F is a mid, vivid cyan. Relative luminance 0.092; OKLCH L 45.5% C 0.134 H 256.5°. Best body text is #FFFFFF at 7.38:1 contrast (WCAG AA passes).

Color values

HEX	#1B559F
RGB	rgb(27, 85, 159)
HSL	hsl(214, 71%, 36%)
HSV	hsv(214, 83%, 62%)
CMYK	cmyk(83%, 46.5%, 0%, 37.6%)
CIE-LAB	lab(36.43, 9.72, -45.36)
CIE-LCH	lch(36.43, 46.39, 282.09°)
OKLab	oklab(45.47% -0.0312 -0.1303)
OKLCH	oklch(45.47% 0.134 256.5)
XYZ	xyz(9.9562, 9.2320, 34.0514)
Luminance	0.0923 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B559F #9F651B

analogous

#1B979F #1B559F #231B9F

triadic

#1B559F #9F1B55 #559F1B

tetradic

#1B559F #9F1B97 #9F651B #1B9F23

square

#1B559F #9F1B97 #9F651B #1B9F23

split-complementary

#1B559F #9F231B #979F1B

monochromatic

#091D36 #12396B #1B559F #2471D3 #5392E2

Accessibility & contrast

On white

7.38

#1B559F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#1B559F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B559F

7.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B559F	#FFFFFF	#000000	##FFFFFF
##1B559F	1.00	7.38	2.85	7.38
#FFFFFF	7.38	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D5CA2

Deuteranopia (green-blind)

#0A509E

Tritanopia (blue-blind)

#006772

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #1b559f;
/* rgb */ color: rgb(27, 85, 159);
/* oklch */ color: oklch(45.5% 0.134 256.5);

Tailwind

colors: {
  custom: {
    50: '#6e84bc',
    500: '#1b559f',
    950: '#000000',
  },
}

SCSS

$custom: #1b559f;
$custom-light: #6e84bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b559f",
  "rgb": {
    "r": 27,
    "g": 85,
    "b": 159
  },
  "hsl": {
    "h": 213.636,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.4547,
    "c": 0.13394,
    "h": 256.5
  },
  "luminance": 0.09233
}

Semantic roles & 50–950 ramp

primary

#1B559F

secondary

#C59251

accent

#9F3AEE

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B559F

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

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