#1B509D#1B509D

#1B509D is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.2% C 0.137 H 258.4°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B509D
RGB	rgb(27, 80, 157)
HSL	hsl(216, 71%, 36%)
HSV	hsv(216, 83%, 62%)
CMYK	cmyk(82.8%, 49%, 0%, 38.4%)
CIE-LAB	lab(34.81, 12.25, -46.76)
CIE-LCH	lch(34.81, 48.34, 284.68°)
OKLab	oklab(44.18% -0.0276 -0.1345)
OKLCH	oklch(44.18% 0.137 258.4)
XYZ	xyz(9.4042, 8.4035, 33.0181)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B509D #9D681B

analogous

#1B919D #1B509D #271B9D

triadic

#1B509D #9D1B50 #509D1B

tetradic

#1B509D #9D1B91 #9D681B #1B9D27

square

#1B509D #9D1B91 #9D681B #1B9D27

split-complementary

#1B509D #9D271B #919D1B

monochromatic

#091B35 #123569 #1B509D #246BD1 #518CE1

Accessibility & contrast

On white

7.83

#1B509D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#1B509D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B509D

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B509D	#FFFFFF	#000000	##FFFFFF
##1B509D	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2358A0

Deuteranopia (green-blind)

#004C9B

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b509d;
/* rgb */ color: rgb(27, 80, 157);
/* oklch */ color: oklch(44.2% 0.137 258.4);

Tailwind

colors: {
  custom: {
    50: '#6e80ba',
    500: '#1b509d',
    950: '#000000',
  },
}

SCSS

$custom: #1b509d;
$custom-light: #6e80ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b509d",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 157
  },
  "hsl": {
    "h": 215.538,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.44179,
    "c": 0.13729,
    "h": 258.4
  },
  "luminance": 0.08405
}

Semantic roles & 50–950 ramp

primary

#1B509D

secondary

#C49550

accent

#A43AED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B509D

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

Preview Lab → · Contrast checker → · Palette generator →