#1B577A#1B577A

#1B577A is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.6% C 0.083 H 238.9°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#1B577A
RGB	rgb(27, 87, 122)
HSL	hsl(202, 64%, 29%)
HSV	hsv(202, 78%, 48%)
CMYK	cmyk(77.9%, 28.7%, 0%, 52.2%)
CIE-LAB	lab(34.91, -6.21, -25.25)
CIE-LCH	lch(34.91, 26.00, 256.18°)
OKLab	oklab(43.59% -0.0431 -0.0713)
OKLCH	oklch(43.59% 0.083 238.9)
XYZ	xyz(7.3717, 8.4537, 19.6518)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B577A #7A3E1B

analogous

#1B7A6E #1B577A #1B287A

triadic

#1B577A #7A1B57 #577A1B

tetradic

#1B577A #6E1B7A #7A3E1B #287A1B

square

#1B577A #6E1B7A #7A3E1B #287A1B

split-complementary

#1B577A #7A1B28 #7A6E1B

monochromatic

#061219 #103348 #1B577A #267BAC #3C9CD4

Accessibility & contrast

On white

7.80

#1B577A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1B577A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B577A

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B577A	#FFFFFF	#000000	##FFFFFF
##1B577A	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#46577C

Deuteranopia (green-blind)

#3A4E79

Tritanopia (blue-blind)

#006063

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b577a;
/* rgb */ color: rgb(27, 87, 122);
/* oklch */ color: oklch(43.6% 0.083 238.9);

Tailwind

colors: {
  custom: {
    50: '#6686a0',
    500: '#1b577a',
    950: '#000000',
  },
}

SCSS

$custom: #1b577a;
$custom-light: #6686a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b577a",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 122
  },
  "hsl": {
    "h": 202.105,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.43586,
    "c": 0.08332,
    "h": 238.9
  },
  "luminance": 0.08455
}

Semantic roles & 50–950 ramp

primary

#1B577A

secondary

#AE6A43

accent

#7E41E7

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0E

muted

#7A7C7E

Preview Lab

Preview with #1B577A

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

Preview Lab → · Contrast checker → · Palette generator →