#1C588B#1C588B

#1C588B is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.103 H 248.4°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#1C588B
RGB	rgb(28, 88, 139)
HSL	hsl(208, 66%, 33%)
HSV	hsv(208, 80%, 55%)
CMYK	cmyk(79.9%, 36.7%, 0%, 45.5%)
CIE-LAB	lab(36.16, -0.11, -33.71)
CIE-LCH	lch(36.16, 33.71, 269.82°)
OKLab	oklab(44.87% -0.038 -0.096)
OKLCH	oklch(44.87% 0.103 248.4)
XYZ	xyz(8.6270, 9.0894, 25.7208)
Luminance	0.0909 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C588B #8B4F1C

analogous

#1C8B87 #1C588B #1C208B

triadic

#1C588B #8B1C58 #588B1C

tetradic

#1C588B #871C8B #8B4F1C #208B1C

square

#1C588B #871C8B #8B4F1C #208B1C

split-complementary

#1C588B #8B1C20 #8B871C

monochromatic

#071825 #123858 #1C588B #2678BE #4797DA

Accessibility & contrast

On white

7.45

#1C588B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#1C588B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C588B

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C588B	#FFFFFF	#000000	##FFFFFF
##1C588B	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#405B8D

Deuteranopia (green-blind)

#30508A

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1c588b;
/* rgb */ color: rgb(28, 88, 139);
/* oklch */ color: oklch(44.9% 0.103 248.4);

Tailwind

colors: {
  custom: {
    50: '#6a86ad',
    500: '#1c588b',
    950: '#000000',
  },
}

SCSS

$custom: #1c588b;
$custom-light: #6a86ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1c588b",
  "rgb": {
    "r": 28,
    "g": 88,
    "b": 139
  },
  "hsl": {
    "h": 207.568,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.44872,
    "c": 0.10324,
    "h": 248.4
  },
  "luminance": 0.0909
}

Semantic roles & 50–950 ramp

primary

#1C588B

secondary

#BC7D47

accent

#8D3EE9

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1C588B

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

Preview Lab → · Contrast checker → · Palette generator →