#1D558E#1D558E

#1D558E is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.4% C 0.110 H 252.1°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#1D558E
RGB	rgb(29, 85, 142)
HSL	hsl(210, 66%, 34%)
HSV	hsv(210, 80%, 56%)
CMYK	cmyk(79.6%, 40.1%, 0%, 44.3%)
CIE-LAB	lab(35.42, 3.14, -36.70)
CIE-LCH	lch(35.42, 36.84, 274.89°)
OKLab	oklab(44.36% -0.0338 -0.1048)
OKLCH	oklch(44.36% 0.11 252.1)
XYZ	xyz(8.6358, 8.7102, 26.8120)
Luminance	0.0871 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D558E #8E561D

analogous

#1D8D8E #1D558E #1D1D8E

triadic

#1D558E #8E1D55 #558E1D

tetradic

#1D558E #8E1D8D #8E561D #1D8E1D

square

#1D558E #8E1D8D #8E561D #1D8E1D

split-complementary

#1D558E #8E1D1D #8D8E1D

monochromatic

#081828 #13375B #1D558E #2773C1 #4B92DA

Accessibility & contrast

On white

7.66

#1D558E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1D558E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D558E

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D558E	#FFFFFF	#000000	##FFFFFF
##1D558E	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A5990

Deuteranopia (green-blind)

#284F8D

Tritanopia (blue-blind)

#00636A

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1d558e;
/* rgb */ color: rgb(29, 85, 142);
/* oklch */ color: oklch(44.4% 0.110 252.1);

Tailwind

colors: {
  custom: {
    50: '#6b84af',
    500: '#1d558e',
    950: '#000000',
  },
}

SCSS

$custom: #1d558e;
$custom-light: #6b84af;
$custom-dark: #000000;

JSON

{
  "hex": "#1d558e",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 142
  },
  "hsl": {
    "h": 210.265,
    "s": 66.082,
    "l": 33.529
  },
  "oklch": {
    "l": 0.4436,
    "c": 0.11011,
    "h": 252.1
  },
  "luminance": 0.08711
}

Semantic roles & 50–950 ramp

primary

#1D558E

secondary

#BD844A

accent

#953FE9

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1D558E

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

Preview Lab → · Contrast checker → · Palette generator →