#1B318F#1B318F

#1B318F is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.4% C 0.157 H 267.3°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#1B318F
RGB	rgb(27, 49, 143)
HSL	hsl(229, 68%, 33%)
HSV	hsv(229, 81%, 56%)
CMYK	cmyk(81.1%, 65.7%, 0%, 43.9%)
CIE-LAB	lab(24.99, 27.86, -54.18)
CIE-LCH	lch(24.99, 60.93, 297.21°)
OKLab	oklab(36.42% -0.0073 -0.1568)
OKLCH	oklch(36.42% 0.157 267.3)
XYZ	xyz(6.5065, 4.4121, 26.4900)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B318F #8F791B

analogous

#1B6B8F #1B318F #3F1B8F

triadic

#1B318F #8F1B31 #318F1B

tetradic

#1B318F #8F1B6B #8F791B #1B8F3F

square

#1B318F #8F1B6B #8F791B #1B8F3F

split-complementary

#1B318F #8F3F1B #6B8F1B

monochromatic

#080E28 #111F5C #1B318F #2543C2 #4864DC

Accessibility & contrast

On white

11.15

#1B318F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B318F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B318F

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B318F	#FFFFFF	#000000	##FFFFFF
##1B318F	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004192

Deuteranopia (green-blind)

#00368D

Tritanopia (blue-blind)

#004A5B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b318f;
/* rgb */ color: rgb(27, 49, 143);
/* oklch */ color: oklch(36.4% 0.157 267.3);

Tailwind

colors: {
  custom: {
    50: '#6d69b1',
    500: '#1b318f',
    950: '#000000',
  },
}

SCSS

$custom: #1b318f;
$custom-light: #6d69b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b318f",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 143
  },
  "hsl": {
    "h": 228.621,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.36421,
    "c": 0.15699,
    "h": 267.3
  },
  "luminance": 0.04413
}

Semantic roles & 50–950 ramp

primary

#1B318F

secondary

#BEA848

accent

#CA3DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B318F

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

Preview Lab → · Contrast checker → · Palette generator →