#1D558B#1D558B

#1D558B is a dark, moderate cyan. Relative luminance 0.086; OKLCH L 44.2% C 0.106 H 250.9°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1D558B
RGB	rgb(29, 85, 139)
HSL	hsl(209, 65%, 33%)
HSV	hsv(209, 79%, 55%)
CMYK	cmyk(79.1%, 38.8%, 0%, 45.5%)
CIE-LAB	lab(35.24, 1.95, -35.15)
CIE-LCH	lch(35.24, 35.21, 273.18°)
OKLab	oklab(44.17% -0.0346 -0.1002)
OKLCH	oklch(44.17% 0.106 250.9)
XYZ	xyz(8.4136, 8.6213, 25.6417)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D558B #8B531D

analogous

#1D8B8A #1D558B #1D1E8B

triadic

#1D558B #8B1D55 #558B1D

tetradic

#1D558B #8A1D8B #8B531D #1E8B1D

square

#1D558B #8A1D8B #8B531D #1E8B1D

split-complementary

#1D558B #8B1D1E #8B8A1D

monochromatic

#081726 #123658 #1D558B #2874BE #4993D9

Accessibility & contrast

On white

7.71

#1D558B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1D558B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D558B

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D558B	#FFFFFF	#000000	##FFFFFF
##1D558B	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C588D

Deuteranopia (green-blind)

#2B4E8A

Tritanopia (blue-blind)

#006269

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1d558b;
/* rgb */ color: rgb(29, 85, 139);
/* oklch */ color: oklch(44.2% 0.106 250.9);

Tailwind

colors: {
  custom: {
    50: '#6a84ad',
    500: '#1d558b',
    950: '#000000',
  },
}

SCSS

$custom: #1d558b;
$custom-light: #6a84ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d558b",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 139
  },
  "hsl": {
    "h": 209.455,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.44165,
    "c": 0.10606,
    "h": 250.9
  },
  "luminance": 0.08622
}

Semantic roles & 50–950 ramp

primary

#1D558B

secondary

#BB8149

accent

#923FE8

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1D558B

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

Preview Lab → · Contrast checker → · Palette generator →