#1B579E#1B579E

#1B579E is a mid, vivid cyan. Relative luminance 0.095; OKLCH L 45.9% C 0.130 H 255.3°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B579E
RGB	rgb(27, 87, 158)
HSL	hsl(213, 71%, 36%)
HSV	hsv(213, 83%, 62%)
CMYK	cmyk(82.9%, 44.9%, 0%, 38%)
CIE-LAB	lab(36.96, 7.99, -43.91)
CIE-LCH	lch(36.96, 44.63, 280.32°)
OKLab	oklab(45.86% -0.033 -0.1259)
OKLCH	oklch(45.86% 0.13 255.3)
XYZ	xyz(10.0294, 9.5168, 33.6494)
Luminance	0.0952 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B579E #9E621B

analogous

#1B999E #1B579E #211B9E

triadic

#1B579E #9E1B57 #579E1B

tetradic

#1B579E #9E1B99 #9E621B #1B9E21

square

#1B579E #9E1B99 #9E621B #1B9E21

split-complementary

#1B579E #9E211B #999E1B

monochromatic

#091D35 #123A6A #1B579E #2474D2 #5294E1

Accessibility & contrast

On white

7.23

#1B579E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#1B579E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B579E

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B579E	#FFFFFF	#000000	##FFFFFF
##1B579E	1.00	7.23	2.90	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#325DA1

Deuteranopia (green-blind)

#16529D

Tritanopia (blue-blind)

#006873

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b579e;
/* rgb */ color: rgb(27, 87, 158);
/* oklch */ color: oklch(45.9% 0.130 255.3);

Tailwind

colors: {
  custom: {
    50: '#6e85bb',
    500: '#1b579e',
    950: '#000000',
  },
}

SCSS

$custom: #1b579e;
$custom-light: #6e85bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b579e",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 158
  },
  "hsl": {
    "h": 212.519,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.45862,
    "c": 0.13018,
    "h": 255.3
  },
  "luminance": 0.09518
}

Semantic roles & 50–950 ramp

primary

#1B579E

secondary

#C48F51

accent

#9B3AEE

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080B12

muted

#7B7C81

Preview Lab

Preview with #1B579E

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

Preview Lab → · Contrast checker → · Palette generator →