#1D5B73#1D5B73

#1D5B73 is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.3% C 0.073 H 227.9°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#1D5B73
RGB	rgb(29, 91, 115)
HSL	hsl(197, 60%, 28%)
HSV	hsv(197, 75%, 45%)
CMYK	cmyk(74.8%, 20.9%, 0%, 54.9%)
CIE-LAB	lab(35.95, -10.97, -19.31)
CIE-LCH	lch(35.95, 22.21, 240.39°)
OKLab	oklab(44.32% -0.0489 -0.0541)
OKLCH	oklch(44.32% 0.073 227.9)
XYZ	xyz(7.3410, 8.9803, 17.5628)
Luminance	0.0898 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D5B73 #73351D

analogous

#1D7360 #1D5B73 #1D3073

triadic

#1D5B73 #731D5B #5B731D

tetradic

#1D5B73 #601D73 #73351D #30731D

square

#1D5B73 #601D73 #73351D #30731D

split-complementary

#1D5B73 #731D30 #73601D

monochromatic

#061318 #113442 #1D5B73 #2982A4 #3CA5CE

Accessibility & contrast

On white

7.51

#1D5B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#1D5B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D5B73

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D5B73	#FFFFFF	#000000	##FFFFFF
##1D5B73	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E5974

Deuteranopia (green-blind)

#435173

Tritanopia (blue-blind)

#006263

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1d5b73;
/* rgb */ color: rgb(29, 91, 115);
/* oklch */ color: oklch(44.3% 0.073 227.9);

Tailwind

colors: {
  custom: {
    50: '#66899b',
    500: '#1d5b73',
    950: '#000000',
  },
}

SCSS

$custom: #1d5b73;
$custom-light: #66899b;
$custom-dark: #000000;

JSON

{
  "hex": "#1d5b73",
  "rgb": {
    "r": 29,
    "g": 91,
    "b": 115
  },
  "hsl": {
    "h": 196.744,
    "s": 59.722,
    "l": 28.235
  },
  "oklch": {
    "l": 0.44319,
    "c": 0.07296,
    "h": 227.9
  },
  "luminance": 0.08981
}

Semantic roles & 50–950 ramp

primary

#1D5B73

secondary

#A76045

accent

#7145E3

background

#F6F8F9

surface

#EBF0F2

border

#C6CBCC

text

#060B0E

muted

#7A7C7E

Preview Lab

Preview with #1D5B73

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

Preview Lab → · Contrast checker → · Palette generator →