#1B577D#1B577D

#1B577D is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.8% C 0.087 H 241.1°. Best body text is #FFFFFF at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B577D
RGB	rgb(27, 87, 125)
HSL	hsl(203, 64%, 30%)
HSV	hsv(203, 78%, 49%)
CMYK	cmyk(78.4%, 30.4%, 0%, 51%)
CIE-LAB	lab(35.06, -5.06, -26.86)
CIE-LCH	lch(35.06, 27.34, 259.33°)
OKLab	oklab(43.76% -0.042 -0.076)
OKLCH	oklch(43.76% 0.087 241.1)
XYZ	xyz(7.5604, 8.5292, 20.6459)
Luminance	0.0853 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B577D #7D411B

analogous

#1B7D72 #1B577D #1B267D

triadic

#1B577D #7D1B57 #577D1B

tetradic

#1B577D #721B7D #7D411B #267D1B

square

#1B577D #721B7D #7D411B #267D1B

split-complementary

#1B577D #7D1B26 #7D721B

monochromatic

#051219 #10344B #1B577D #267AAF #3D9AD5

Accessibility & contrast

On white

7.76

#1B577D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1B577D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B577D

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B577D	#FFFFFF	#000000	##FFFFFF
##1B577D	1.00	7.76	2.71	7.76
#FFFFFF	7.76	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#45587F

Deuteranopia (green-blind)

#384E7C

Tritanopia (blue-blind)

#006064

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b577d;
/* rgb */ color: rgb(27, 87, 125);
/* oklch */ color: oklch(43.8% 0.087 241.1);

Tailwind

colors: {
  custom: {
    50: '#6786a3',
    500: '#1b577d',
    950: '#000000',
  },
}

SCSS

$custom: #1b577d;
$custom-light: #6786a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b577d",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 125
  },
  "hsl": {
    "h": 203.265,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.43756,
    "c": 0.08685,
    "h": 241.1
  },
  "luminance": 0.0853
}

Semantic roles & 50–950 ramp

primary

#1B577D

secondary

#B16E43

accent

#8140E7

background

#F6F8FA

surface

#EBEFF3

border

#C6CACD

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B577D

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

Preview Lab → · Contrast checker → · Palette generator →