#1B577E#1B577E

#1B577E is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 43.8% C 0.088 H 241.7°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#1B577E
RGB	rgb(27, 87, 126)
HSL	hsl(204, 65%, 30%)
HSV	hsv(204, 79%, 49%)
CMYK	cmyk(78.6%, 31%, 0%, 50.6%)
CIE-LAB	lab(35.11, -4.67, -27.40)
CIE-LCH	lch(35.11, 27.79, 260.32°)
OKLab	oklab(43.81% -0.0417 -0.0776)
OKLCH	oklch(43.81% 0.088 241.7)
XYZ	xyz(7.6246, 8.5549, 20.9840)
Luminance	0.0856 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B577E #7E421B

analogous

#1B7E73 #1B577E #1B267E

triadic

#1B577E #7E1B57 #577E1B

tetradic

#1B577E #731B7E #7E421B #267E1B

square

#1B577E #731B7E #7E421B #267E1B

split-complementary

#1B577E #7E1B26 #7E731B

monochromatic

#051119 #10344C #1B577E #267AB0 #3E9AD6

Accessibility & contrast

On white

7.75

#1B577E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1B577E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B577E

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B577E	#FFFFFF	#000000	##FFFFFF
##1B577E	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#455880

Deuteranopia (green-blind)

#374E7D

Tritanopia (blue-blind)

#006165

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b577e;
/* rgb */ color: rgb(27, 87, 126);
/* oklch */ color: oklch(43.8% 0.088 241.7);

Tailwind

colors: {
  custom: {
    50: '#6786a3',
    500: '#1b577e',
    950: '#000000',
  },
}

SCSS

$custom: #1b577e;
$custom-light: #6786a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b577e",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 126
  },
  "hsl": {
    "h": 203.636,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.43813,
    "c": 0.08806,
    "h": 241.7
  },
  "luminance": 0.08556
}

Semantic roles & 50–950 ramp

primary

#1B577E

secondary

#B26F43

accent

#8240E8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B577E

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

Preview Lab → · Contrast checker → · Palette generator →