#1C577B#1C577B

#1C577B is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.7% C 0.084 H 239.9°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#1C577B
RGB	rgb(28, 87, 123)
HSL	hsl(203, 63%, 30%)
HSV	hsv(203, 77%, 48%)
CMYK	cmyk(77.2%, 29.3%, 0%, 51.8%)
CIE-LAB	lab(34.99, -5.69, -25.74)
CIE-LCH	lch(34.99, 26.36, 257.53°)
OKLab	oklab(43.67% -0.0422 -0.0727)
OKLCH	oklch(43.67% 0.084 239.9)
XYZ	xyz(7.4608, 8.4925, 19.9810)
Luminance	0.0849 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C577B #7B401C

analogous

#1C7B70 #1C577B #1C277B

triadic

#1C577B #7B1C57 #577B1C

tetradic

#1C577B #701C7B #7B401C #277B1C

square

#1C577B #701C7B #7B401C #277B1C

split-complementary

#1C577B #7B1C27 #7B701C

monochromatic

#061219 #113449 #1C577B #277AAD #3E9BD3

Accessibility & contrast

On white

7.78

#1C577B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#1C577B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C577B

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C577B	#FFFFFF	#000000	##FFFFFF
##1C577B	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#46577D

Deuteranopia (green-blind)

#394E7A

Tritanopia (blue-blind)

#006064

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1c577b;
/* rgb */ color: rgb(28, 87, 123);
/* oklch */ color: oklch(43.7% 0.084 239.9);

Tailwind

colors: {
  custom: {
    50: '#6786a1',
    500: '#1c577b',
    950: '#000000',
  },
}

SCSS

$custom: #1c577b;
$custom-light: #6786a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1c577b",
  "rgb": {
    "r": 28,
    "g": 87,
    "b": 123
  },
  "hsl": {
    "h": 202.737,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.43672,
    "c": 0.08408,
    "h": 239.9
  },
  "luminance": 0.08493
}

Semantic roles & 50–950 ramp

primary

#1C577B

secondary

#AF6C44

accent

#8042E6

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #1C577B

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

Preview Lab → · Contrast checker → · Palette generator →