#1B5D9E#1B5D9E

#1B5D9E is a mid, vivid cyan. Relative luminance 0.105; OKLCH L 47.3% C 0.123 H 252.0°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B5D9E
RGB	rgb(27, 93, 158)
HSL	hsl(210, 71%, 36%)
HSV	hsv(210, 83%, 62%)
CMYK	cmyk(82.9%, 41.1%, 0%, 38%)
CIE-LAB	lab(38.78, 4.08, -41.00)
CIE-LCH	lch(38.78, 41.21, 275.69°)
OKLab	oklab(47.27% -0.0381 -0.1173)
OKLCH	oklch(47.27% 0.123 252)
XYZ	xyz(10.5356, 10.5290, 33.8182)
Luminance	0.1053 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5D9E #9E5C1B

analogous

#1B9E9E #1B5D9E #1B1C9E

triadic

#1B5D9E #9E1B5D #5D9E1B

tetradic

#1B5D9E #9E1B9E #9E5C1B #1C9E1B

square

#1B5D9E #9E1B9E #9E5C1B #1C9E1B

split-complementary

#1B5D9E #9E1B1C #9E9E1B

monochromatic

#091F35 #123E6A #1B5D9E #247CD2 #529AE1

Accessibility & contrast

On white

6.76

#1B5D9E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#1B5D9E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B5D9E

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5D9E	#FFFFFF	#000000	##FFFFFF
##1B5D9E	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D62A1

Deuteranopia (green-blind)

#27569D

Tritanopia (blue-blind)

#006D76

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1b5d9e;
/* rgb */ color: rgb(27, 93, 158);
/* oklch */ color: oklch(47.3% 0.123 252.0);

Tailwind

colors: {
  custom: {
    50: '#6e8abb',
    500: '#1b5d9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b5d9e;
$custom-light: #6e8abb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5d9e",
  "rgb": {
    "r": 27,
    "g": 93,
    "b": 158
  },
  "hsl": {
    "h": 209.771,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.47274,
    "c": 0.12329,
    "h": 252
  },
  "luminance": 0.1053
}

Semantic roles & 50–950 ramp

primary

#1B5D9E

secondary

#C48A51

accent

#933AEE

background

#F7F8FB

surface

#EDF0F6

border

#C8CBD0

text

#080B12

muted

#7B7C81

Preview Lab

Preview with #1B5D9E

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

Preview Lab → · Contrast checker → · Palette generator →