#1B318D#1B318D

#1B318D is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.2% C 0.154 H 267.3°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B318D
RGB	rgb(27, 49, 141)
HSL	hsl(228, 68%, 33%)
HSV	hsv(228, 81%, 55%)
CMYK	cmyk(80.9%, 65.2%, 0%, 44.7%)
CIE-LAB	lab(24.80, 27.08, -53.25)
CIE-LCH	lch(24.80, 59.74, 296.95°)
OKLab	oklab(36.23% -0.0072 -0.1541)
OKLCH	oklch(36.23% 0.154 267.3)
XYZ	xyz(6.3563, 4.3520, 25.6992)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B318D #8D771B

analogous

#1B6A8D #1B318D #3E1B8D

triadic

#1B318D #8D1B31 #318D1B

tetradic

#1B318D #8D1B6A #8D771B #1B8D3E

square

#1B318D #8D1B6A #8D771B #1B8D3E

split-complementary

#1B318D #8D3E1B #6A8D1B

monochromatic

#070D26 #111F5A #1B318D #2543C0 #4763DC

Accessibility & contrast

On white

11.23

#1B318D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1B318D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B318D

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B318D	#FFFFFF	#000000	##FFFFFF
##1B318D	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004090

Deuteranopia (green-blind)

#00368B

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b318d;
/* rgb */ color: rgb(27, 49, 141);
/* oklch */ color: oklch(36.2% 0.154 267.3);

Tailwind

colors: {
  custom: {
    50: '#6c69af',
    500: '#1b318d',
    950: '#000000',
  },
}

SCSS

$custom: #1b318d;
$custom-light: #6c69af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b318d",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 141
  },
  "hsl": {
    "h": 228.421,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36226,
    "c": 0.15426,
    "h": 267.3
  },
  "luminance": 0.04353
}

Semantic roles & 50–950 ramp

primary

#1B318D

secondary

#BDA646

accent

#C93DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1B318D

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

Preview Lab → · Contrast checker → · Palette generator →