#1B579F#1B579F

#1B579F is a mid, vivid cyan. Relative luminance 0.096; OKLCH L 45.9% C 0.132 H 255.6°. Best body text is #FFFFFF at 7.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B579F
RGB	rgb(27, 87, 159)
HSL	hsl(213, 71%, 36%)
HSV	hsv(213, 83%, 62%)
CMYK	cmyk(83%, 45.3%, 0%, 37.6%)
CIE-LAB	lab(37.02, 8.40, -44.40)
CIE-LCH	lch(37.02, 45.19, 280.71°)
OKLab	oklab(45.93% -0.0328 -0.1274)
OKLCH	oklch(45.93% 0.132 255.6)
XYZ	xyz(10.1159, 9.5514, 34.1046)
Luminance	0.0955 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B579F #9F631B

analogous

#1B999F #1B579F #211B9F

triadic

#1B579F #9F1B57 #579F1B

tetradic

#1B579F #9F1B99 #9F631B #1B9F21

square

#1B579F #9F1B99 #9F631B #1B9F21

split-complementary

#1B579F #9F211B #999F1B

monochromatic

#091E36 #123A6B #1B579F #2474D3 #5394E2

Accessibility & contrast

On white

7.22

#1B579F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#1B579F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B579F

7.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B579F	#FFFFFF	#000000	##FFFFFF
##1B579F	1.00	7.22	2.91	7.22
#FFFFFF	7.22	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#315DA2

Deuteranopia (green-blind)

#14529E

Tritanopia (blue-blind)

#006873

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b579f;
/* rgb */ color: rgb(27, 87, 159);
/* oklch */ color: oklch(45.9% 0.132 255.6);

Tailwind

colors: {
  custom: {
    50: '#6e85bc',
    500: '#1b579f',
    950: '#000000',
  },
}

SCSS

$custom: #1b579f;
$custom-light: #6e85bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b579f",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 159
  },
  "hsl": {
    "h": 212.727,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.45932,
    "c": 0.13154,
    "h": 255.6
  },
  "luminance": 0.09553
}

Semantic roles & 50–950 ramp

primary

#1B579F

secondary

#C59051

accent

#9C3AEE

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080B12

muted

#7B7C81

Preview Lab

Preview with #1B579F

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

Preview Lab → · Contrast checker → · Palette generator →