#1B5D9D#1B5D9D

#1B5D9D is a mid, vivid cyan. Relative luminance 0.105; OKLCH L 47.2% C 0.122 H 251.7°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B5D9D
RGB	rgb(27, 93, 157)
HSL	hsl(210, 71%, 36%)
HSV	hsv(210, 83%, 62%)
CMYK	cmyk(82.8%, 40.8%, 0%, 38.4%)
CIE-LAB	lab(38.72, 3.69, -40.50)
CIE-LCH	lch(38.72, 40.67, 275.20°)
OKLab	oklab(47.21% -0.0383 -0.1158)
OKLCH	oklch(47.21% 0.122 251.7)
XYZ	xyz(10.4498, 10.4947, 33.3667)
Luminance	0.1050 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5D9D #9D5B1B

analogous

#1B9D9C #1B5D9D #1B1C9D

triadic

#1B5D9D #9D1B5D #5D9D1B

tetradic

#1B5D9D #9C1B9D #9D5B1B #1C9D1B

square

#1B5D9D #9C1B9D #9D5B1B #1C9D1B

split-complementary

#1B5D9D #9D1B1C #9D9C1B

monochromatic

#091F35 #123E69 #1B5D9D #247CD1 #519AE1

Accessibility & contrast

On white

6.78

#1B5D9D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#1B5D9D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B5D9D

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5D9D	#FFFFFF	#000000	##FFFFFF
##1B5D9D	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E61A0

Deuteranopia (green-blind)

#28569C

Tritanopia (blue-blind)

#006C75

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1b5d9d;
/* rgb */ color: rgb(27, 93, 157);
/* oklch */ color: oklch(47.2% 0.122 251.7);

Tailwind

colors: {
  custom: {
    50: '#6e8aba',
    500: '#1b5d9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b5d9d;
$custom-light: #6e8aba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5d9d",
  "rgb": {
    "r": 27,
    "g": 93,
    "b": 157
  },
  "hsl": {
    "h": 209.538,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.47208,
    "c": 0.12197,
    "h": 251.7
  },
  "luminance": 0.10496
}

Semantic roles & 50–950 ramp

primary

#1B5D9D

secondary

#C48950

accent

#933AED

background

#F7F8FB

surface

#EDF0F6

border

#C8CBD0

text

#080B12

muted

#7B7C81

Preview Lab

Preview with #1B5D9D

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

Preview Lab → · Contrast checker → · Palette generator →