#1B5B84#1B5B84

#1B5B84 is a mid, moderate cyan. Relative luminance 0.094; OKLCH L 45.2% C 0.092 H 241.6°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B5B84
RGB	rgb(27, 91, 132)
HSL	hsl(203, 66%, 31%)
HSV	hsv(203, 80%, 52%)
CMYK	cmyk(79.5%, 31.1%, 0%, 48.2%)
CIE-LAB	lab(36.71, -4.85, -28.58)
CIE-LCH	lch(36.71, 28.98, 260.36°)
OKLab	oklab(45.18% -0.0437 -0.0809)
OKLCH	oklch(45.18% 0.092 241.6)
XYZ	xyz(8.3563, 9.3801, 23.1955)
Luminance	0.0938 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5B84 #84441B

analogous

#1B8478 #1B5B84 #1B2684

triadic

#1B5B84 #841B5B #5B841B

tetradic

#1B5B84 #781B84 #84441B #26841B

square

#1B5B84 #781B84 #84441B #26841B

split-complementary

#1B5B84 #841B26 #84781B

monochromatic

#06151E #113851 #1B5B84 #257EB7 #419DD8

Accessibility & contrast

On white

7.30

#1B5B84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#1B5B84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5B84

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5B84	#FFFFFF	#000000	##FFFFFF
##1B5B84	1.00	7.30	2.88	7.30
#FFFFFF	7.30	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#485C86

Deuteranopia (green-blind)

#395283

Tritanopia (blue-blind)

#006569

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #1b5b84;
/* rgb */ color: rgb(27, 91, 132);
/* oklch */ color: oklch(45.2% 0.092 241.6);

Tailwind

colors: {
  custom: {
    50: '#6889a8',
    500: '#1b5b84',
    950: '#000000',
  },
}

SCSS

$custom: #1b5b84;
$custom-light: #6889a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5b84",
  "rgb": {
    "r": 27,
    "g": 91,
    "b": 132
  },
  "hsl": {
    "h": 203.429,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.45176,
    "c": 0.09198,
    "h": 241.6
  },
  "luminance": 0.09381
}

Semantic roles & 50–950 ramp

primary

#1B5B84

secondary

#B77143

accent

#813FE9

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B5B84

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

Preview Lab → · Contrast checker → · Palette generator →