#1D559B#1D559B

#1D559B is a mid, vivid cyan. Relative luminance 0.091; OKLCH L 45.2% C 0.128 H 256.0°. Best body text is #FFFFFF at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#1D559B
RGB	rgb(29, 85, 155)
HSL	hsl(213, 68%, 36%)
HSV	hsv(213, 81%, 61%)
CMYK	cmyk(81.3%, 45.2%, 0%, 39.2%)
CIE-LAB	lab(36.22, 8.32, -43.29)
CIE-LCH	lch(36.22, 44.08, 280.88°)
OKLab	oklab(45.24% -0.0309 -0.1241)
OKLCH	oklch(45.24% 0.128 256)
XYZ	xyz(9.6694, 9.1236, 32.2554)
Luminance	0.0912 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D559B #9B631D

analogous

#1D949B #1D559B #241D9B

triadic

#1D559B #9B1D55 #559B1D

tetradic

#1D559B #9B1D94 #9B631D #1D9B24

square

#1D559B #9B1D94 #9B631D #1D9B24

split-complementary

#1D559B #9B241D #949B1D

monochromatic

#0A1C34 #133967 #1D559B #2771CF #5391DF

Accessibility & contrast

On white

7.43

#1D559B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#1D559B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D559B

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D559B	#FFFFFF	#000000	##FFFFFF
##1D559B	1.00	7.43	2.83	7.43
#FFFFFF	7.43	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#315B9E

Deuteranopia (green-blind)

#16509A

Tritanopia (blue-blind)

#006670

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1d559b;
/* rgb */ color: rgb(29, 85, 155);
/* oklch */ color: oklch(45.2% 0.128 256.0);

Tailwind

colors: {
  custom: {
    50: '#6e84b9',
    500: '#1d559b',
    950: '#000000',
  },
}

SCSS

$custom: #1d559b;
$custom-light: #6e84b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d559b",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 155
  },
  "hsl": {
    "h": 213.333,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.45242,
    "c": 0.12791,
    "h": 256
  },
  "luminance": 0.09125
}

Semantic roles & 50–950 ramp

primary

#1D559B

secondary

#C29052

accent

#9E3CEB

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1D559B

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

Preview Lab → · Contrast checker → · Palette generator →