#1D557B#1D557B

#1D557B is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 43.2% C 0.085 H 242.4°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#1D557B
RGB	rgb(29, 85, 123)
HSL	hsl(204, 62%, 30%)
HSV	hsv(204, 76%, 48%)
CMYK	cmyk(76.4%, 30.9%, 0%, 51.8%)
CIE-LAB	lab(34.37, -4.30, -26.71)
CIE-LCH	lch(34.37, 27.05, 260.86°)
OKLab	oklab(43.19% -0.0395 -0.0756)
OKLCH	oklch(43.19% 0.085 242.4)
XYZ	xyz(7.3290, 8.1874, 19.9291)
Luminance	0.0819 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D557B #7B431D

analogous

#1D7B72 #1D557B #1D267B

triadic

#1D557B #7B1D55 #557B1D

tetradic

#1D557B #721D7B #7B431D #267B1D

square

#1D557B #721D7B #7B431D #267B1D

split-complementary

#1D557B #7B1D26 #7B721D

monochromatic

#061119 #113349 #1D557B #2977AD #4097D2

Accessibility & contrast

On white

7.96

#1D557B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1D557B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D557B

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D557B	#FFFFFF	#000000	##FFFFFF
##1D557B	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#43567D

Deuteranopia (green-blind)

#364D7A

Tritanopia (blue-blind)

#005E62

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1d557b;
/* rgb */ color: rgb(29, 85, 123);
/* oklch */ color: oklch(43.2% 0.085 242.4);

Tailwind

colors: {
  custom: {
    50: '#6784a1',
    500: '#1d557b',
    950: '#000000',
  },
}

SCSS

$custom: #1d557b;
$custom-light: #6784a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d557b",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 123
  },
  "hsl": {
    "h": 204.255,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.43191,
    "c": 0.08527,
    "h": 242.4
  },
  "luminance": 0.08188
}

Semantic roles & 50–950 ramp

primary

#1D557B

secondary

#AF7045

accent

#8443E5

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070A0F

muted

#7A7C7E

Preview Lab

Preview with #1D557B

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

Preview Lab → · Contrast checker → · Palette generator →