#1B598F#1B598F

#1B598F is a mid, moderate cyan. Relative luminance 0.094; OKLCH L 45.3% C 0.108 H 249.1°. Best body text is #FFFFFF at 7.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B598F
RGB	rgb(27, 89, 143)
HSL	hsl(208, 68%, 33%)
HSV	hsv(208, 81%, 56%)
CMYK	cmyk(81.1%, 37.8%, 0%, 43.9%)
CIE-LAB	lab(36.67, 0.71, -35.33)
CIE-LCH	lch(36.67, 35.34, 271.16°)
OKLab	oklab(45.34% -0.0384 -0.1007)
OKLCH	oklch(45.34% 0.108 249.1)
XYZ	xyz(8.9804, 9.3599, 27.3146)
Luminance	0.0936 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B598F #8F511B

analogous

#1B8F8B #1B598F #1B1F8F

triadic

#1B598F #8F1B59 #598F1B

tetradic

#1B598F #8B1B8F #8F511B #1F8F1B

square

#1B598F #8B1B8F #8F511B #1F8F1B

split-complementary

#1B598F #8F1B1F #8F8B1B

monochromatic

#081928 #11395C #1B598F #2579C2 #4897DC

Accessibility & contrast

On white

7.31

#1B598F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#1B598F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B598F

7.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B598F	#FFFFFF	#000000	##FFFFFF
##1B598F	1.00	7.31	2.87	7.31
#FFFFFF	7.31	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#405C91

Deuteranopia (green-blind)

#2E518E

Tritanopia (blue-blind)

#00666D

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #1b598f;
/* rgb */ color: rgb(27, 89, 143);
/* oklch */ color: oklch(45.3% 0.108 249.1);

Tailwind

colors: {
  custom: {
    50: '#6b87b0',
    500: '#1b598f',
    950: '#000000',
  },
}

SCSS

$custom: #1b598f;
$custom-light: #6b87b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b598f",
  "rgb": {
    "r": 27,
    "g": 89,
    "b": 143
  },
  "hsl": {
    "h": 207.931,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.4534,
    "c": 0.10777,
    "h": 249.1
  },
  "luminance": 0.09361
}

Semantic roles & 50–950 ramp

primary

#1B598F

secondary

#BE7F48

accent

#8E3DEB

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1B598F

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

Preview Lab → · Contrast checker → · Palette generator →