#1B597F#1B597F

#1B597F is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.4% C 0.088 H 240.3°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#1B597F
RGB	rgb(27, 89, 127)
HSL	hsl(203, 65%, 30%)
HSV	hsv(203, 79%, 50%)
CMYK	cmyk(78.7%, 29.9%, 0%, 50.2%)
CIE-LAB	lab(35.81, -5.54, -26.92)
CIE-LCH	lch(35.81, 27.48, 258.38°)
OKLab	oklab(44.38% -0.0434 -0.0761)
OKLCH	oklch(44.38% 0.088 240.3)
XYZ	xyz(7.8536, 8.9091, 21.3803)
Luminance	0.0891 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B597F #7F411B

analogous

#1B7F73 #1B597F #1B277F

triadic

#1B597F #7F1B59 #597F1B

tetradic

#1B597F #731B7F #7F411B #277F1B

square

#1B597F #731B7F #7F411B #277F1B

split-complementary

#1B597F #7F1B27 #7F731B

monochromatic

#06121A #10364D #1B597F #267CB1 #3E9CD6

Accessibility & contrast

On white

7.55

#1B597F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#1B597F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B597F

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B597F	#FFFFFF	#000000	##FFFFFF
##1B597F	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#475981

Deuteranopia (green-blind)

#3A507E

Tritanopia (blue-blind)

#006366

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1b597f;
/* rgb */ color: rgb(27, 89, 127);
/* oklch */ color: oklch(44.4% 0.088 240.3);

Tailwind

colors: {
  custom: {
    50: '#6787a4',
    500: '#1b597f',
    950: '#000000',
  },
}

SCSS

$custom: #1b597f;
$custom-light: #6787a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b597f",
  "rgb": {
    "r": 27,
    "g": 89,
    "b": 127
  },
  "hsl": {
    "h": 202.8,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.44381,
    "c": 0.08764,
    "h": 240.3
  },
  "luminance": 0.0891
}

Semantic roles & 50–950 ramp

primary

#1B597F

secondary

#B36D43

accent

#8040E8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B597F

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

Preview Lab → · Contrast checker → · Palette generator →