#1B319E#1B319E

#1B319E is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.9% C 0.177 H 267.4°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#1B319E
RGB	rgb(27, 49, 158)
HSL	hsl(230, 71%, 36%)
HSV	hsv(230, 83%, 62%)
CMYK	cmyk(82.9%, 69%, 0%, 38%)
CIE-LAB	lab(26.44, 33.60, -61.01)
CIE-LCH	lch(26.44, 69.65, 298.85°)
OKLab	oklab(37.92% -0.0081 -0.1767)
OKLCH	oklch(37.92% 0.177 267.4)
XYZ	xyz(7.7197, 4.8973, 32.8795)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B319E #9E881B

analogous

#1B739E #1B319E #471B9E

triadic

#1B319E #9E1B31 #319E1B

tetradic

#1B319E #9E1B73 #9E881B #1B9E47

square

#1B319E #9E1B73 #9E881B #1B9E47

split-complementary

#1B319E #9E471B #739E1B

monochromatic

#091135 #12216A #1B319E #2441D2 #526AE1

Accessibility & contrast

On white

10.61

#1B319E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1B319E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B319E

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B319E	#FFFFFF	#000000	##FFFFFF
##1B319E	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A1

Deuteranopia (green-blind)

#00389C

Tritanopia (blue-blind)

#004F63

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b319e;
/* rgb */ color: rgb(27, 49, 158);
/* oklch */ color: oklch(37.9% 0.177 267.4);

Tailwind

colors: {
  custom: {
    50: '#7169bc',
    500: '#1b319e',
    950: '#000000',
  },
}

SCSS

$custom: #1b319e;
$custom-light: #7169bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b319e",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 158
  },
  "hsl": {
    "h": 229.924,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.37924,
    "c": 0.17693,
    "h": 267.4
  },
  "luminance": 0.04898
}

Semantic roles & 50–950 ramp

primary

#1B319E

secondary

#C4B151

accent

#CF3AEE

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B319E

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

Preview Lab → · Contrast checker → · Palette generator →