#1B319F#1B319F

#1B319F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 38.0% C 0.178 H 267.4°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#1B319F
RGB	rgb(27, 49, 159)
HSL	hsl(230, 71%, 36%)
HSV	hsv(230, 83%, 62%)
CMYK	cmyk(83%, 69.2%, 0%, 37.6%)
CIE-LAB	lab(26.54, 33.98, -61.45)
CIE-LCH	lch(26.54, 70.22, 298.94°)
OKLab	oklab(38.03% -0.0081 -0.1781)
OKLCH	oklch(38.03% 0.178 267.4)
XYZ	xyz(7.8061, 4.9319, 33.3347)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B319F #9F891B

analogous

#1B739F #1B319F #471B9F

triadic

#1B319F #9F1B31 #319F1B

tetradic

#1B319F #9F1B73 #9F891B #1B9F47

square

#1B319F #9F1B73 #9F891B #1B9F47

split-complementary

#1B319F #9F471B #739F1B

monochromatic

#091136 #12216B #1B319F #2441D3 #536BE2

Accessibility & contrast

On white

10.57

#1B319F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1B319F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B319F

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B319F	#FFFFFF	#000000	##FFFFFF
##1B319F	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A2

Deuteranopia (green-blind)

#00389D

Tritanopia (blue-blind)

#004F64

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b319f;
/* rgb */ color: rgb(27, 49, 159);
/* oklch */ color: oklch(38.0% 0.178 267.4);

Tailwind

colors: {
  custom: {
    50: '#7169bc',
    500: '#1b319f',
    950: '#000000',
  },
}

SCSS

$custom: #1b319f;
$custom-light: #7169bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b319f",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 159
  },
  "hsl": {
    "h": 230,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.38027,
    "c": 0.17824,
    "h": 267.4
  },
  "luminance": 0.04933
}

Semantic roles & 50–950 ramp

primary

#1B319F

secondary

#C5B151

accent

#D03AEE

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B319F

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

Preview Lab → · Contrast checker → · Palette generator →