#1B5D8B#1B5D8B

#1B5D8B is a mid, moderate cyan. Relative luminance 0.099; OKLCH L 46.1% C 0.099 H 243.9°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B5D8B
RGB	rgb(27, 93, 139)
HSL	hsl(205, 67%, 33%)
HSV	hsv(205, 81%, 55%)
CMYK	cmyk(80.6%, 33.1%, 0%, 45.5%)
CIE-LAB	lab(37.71, -3.39, -31.26)
CIE-LCH	lch(37.71, 31.44, 263.81°)
OKLab	oklab(46.09% -0.0434 -0.0887)
OKLCH	oklch(46.09% 0.099 243.9)
XYZ	xyz(9.0247, 9.9247, 25.8611)
Luminance	0.0993 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5D8B #8B491B

analogous

#1B8B81 #1B5D8B #1B258B

triadic

#1B5D8B #8B1B5D #5D8B1B

tetradic

#1B5D8B #811B8B #8B491B #258B1B

square

#1B5D8B #811B8B #8B491B #258B1B

split-complementary

#1B5D8B #8B1B25 #8B811B

monochromatic

#071825 #113B58 #1B5D8B #257FBE #459EDB

Accessibility & contrast

On white

7.03

#1B5D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#1B5D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5D8B

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5D8B	#FFFFFF	#000000	##FFFFFF
##1B5D8B	1.00	7.03	2.99	7.03
#FFFFFF	7.03	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#485E8D

Deuteranopia (green-blind)

#38548A

Tritanopia (blue-blind)

#00686D

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1b5d8b;
/* rgb */ color: rgb(27, 93, 139);
/* oklch */ color: oklch(46.1% 0.099 243.9);

Tailwind

colors: {
  custom: {
    50: '#6a8aad',
    500: '#1b5d8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b5d8b;
$custom-light: #6a8aad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5d8b",
  "rgb": {
    "r": 27,
    "g": 93,
    "b": 139
  },
  "hsl": {
    "h": 204.643,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.46087,
    "c": 0.09878,
    "h": 243.9
  },
  "luminance": 0.09926
}

Semantic roles & 50–950 ramp

primary

#1B5D8B

secondary

#BC7645

accent

#843DEA

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1B5D8B

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

Preview Lab → · Contrast checker → · Palette generator →