#1B578E#1B578E

#1B578E is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.8% C 0.109 H 250.2°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B578E
RGB	rgb(27, 87, 142)
HSL	hsl(209, 68%, 33%)
HSV	hsv(209, 81%, 56%)
CMYK	cmyk(81%, 38.7%, 0%, 44.3%)
CIE-LAB	lab(35.99, 1.61, -35.80)
CIE-LCH	lch(35.99, 35.84, 272.57°)
OKLab	oklab(44.79% -0.0368 -0.1021)
OKLCH	oklch(44.79% 0.109 250.2)
XYZ	xyz(8.7408, 9.0013, 26.8627)
Luminance	0.0900 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B578E #8E521B

analogous

#1B8E8B #1B578E #1B1D8E

triadic

#1B578E #8E1B57 #578E1B

tetradic

#1B578E #8B1B8E #8E521B #1D8E1B

square

#1B578E #8B1B8E #8E521B #1D8E1B

split-complementary

#1B578E #8E1B1D #8E8B1B

monochromatic

#071827 #11375B #1B578E #2577C1 #4795DC

Accessibility & contrast

On white

7.50

#1B578E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#1B578E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B578E

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B578E	#FFFFFF	#000000	##FFFFFF
##1B578E	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D5A90

Deuteranopia (green-blind)

#2B508D

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1b578e;
/* rgb */ color: rgb(27, 87, 142);
/* oklch */ color: oklch(44.8% 0.109 250.2);

Tailwind

colors: {
  custom: {
    50: '#6a86af',
    500: '#1b578e',
    950: '#000000',
  },
}

SCSS

$custom: #1b578e;
$custom-light: #6a86af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b578e",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 142
  },
  "hsl": {
    "h": 208.696,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.44787,
    "c": 0.10856,
    "h": 250.2
  },
  "luminance": 0.09002
}

Semantic roles & 50–950 ramp

primary

#1B578E

secondary

#BE8047

accent

#903DEB

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1B578E

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

Preview Lab → · Contrast checker → · Palette generator →