#1C558B#1C558B

#1C558B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.1% C 0.106 H 250.7°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#1C558B
RGB	rgb(28, 85, 139)
HSL	hsl(209, 66%, 33%)
HSV	hsv(209, 80%, 55%)
CMYK	cmyk(79.9%, 38.8%, 0%, 45.5%)
CIE-LAB	lab(35.22, 1.83, -35.20)
CIE-LCH	lch(35.22, 35.25, 272.98°)
OKLab	oklab(44.14% -0.0352 -0.1004)
OKLCH	oklch(44.14% 0.106 250.7)
XYZ	xyz(8.3858, 8.6070, 25.6404)
Luminance	0.0861 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C558B #8B521C

analogous

#1C8B89 #1C558B #1C1E8B

triadic

#1C558B #8B1C55 #558B1C

tetradic

#1C558B #891C8B #8B521C #1E8B1C

square

#1C558B #891C8B #8B521C #1E8B1C

split-complementary

#1C558B #8B1C1E #8B891C

monochromatic

#071725 #123658 #1C558B #2674BE #4793DA

Accessibility & contrast

On white

7.72

#1C558B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1C558B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C558B

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C558B	#FFFFFF	#000000	##FFFFFF
##1C558B	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C588D

Deuteranopia (green-blind)

#2A4E8A

Tritanopia (blue-blind)

#006269

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1c558b;
/* rgb */ color: rgb(28, 85, 139);
/* oklch */ color: oklch(44.1% 0.106 250.7);

Tailwind

colors: {
  custom: {
    50: '#6a84ad',
    500: '#1c558b',
    950: '#000000',
  },
}

SCSS

$custom: #1c558b;
$custom-light: #6a84ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1c558b",
  "rgb": {
    "r": 28,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 209.189,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.44135,
    "c": 0.10639,
    "h": 250.7
  },
  "luminance": 0.08608
}

Semantic roles & 50–950 ramp

primary

#1C558B

secondary

#BC8047

accent

#923EE9

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1C558B

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

Preview Lab → · Contrast checker → · Palette generator →