#1B338D#1B338D

#1B338D is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.6% C 0.152 H 266.8°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#1B338D
RGB	rgb(27, 51, 141)
HSL	hsl(227, 68%, 33%)
HSV	hsv(227, 81%, 55%)
CMYK	cmyk(80.9%, 63.8%, 0%, 44.7%)
CIE-LAB	lab(25.33, 25.71, -52.39)
CIE-LCH	lch(25.33, 58.36, 296.14°)
OKLab	oklab(36.61% -0.0084 -0.1515)
OKLCH	oklch(36.61% 0.152 266.8)
XYZ	xyz(6.4419, 4.5230, 25.7277)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B338D #8D751B

analogous

#1B6C8D #1B338D #3C1B8D

triadic

#1B338D #8D1B33 #338D1B

tetradic

#1B338D #8D1B6C #8D751B #1B8D3C

square

#1B338D #8D1B6C #8D751B #1B8D3C

split-complementary

#1B338D #8D3C1B #6C8D1B

monochromatic

#070E26 #11205A #1B338D #2546C0 #4766DC

Accessibility & contrast

On white

11.02

#1B338D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B338D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B338D

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B338D	#FFFFFF	#000000	##FFFFFF
##1B338D	1.00	11.02	1.90	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004290

Deuteranopia (green-blind)

#00378B

Tritanopia (blue-blind)

#004A5B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b338d;
/* rgb */ color: rgb(27, 51, 141);
/* oklch */ color: oklch(36.6% 0.152 266.8);

Tailwind

colors: {
  custom: {
    50: '#6c6aaf',
    500: '#1b338d',
    950: '#000000',
  },
}

SCSS

$custom: #1b338d;
$custom-light: #6c6aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b338d",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 141
  },
  "hsl": {
    "h": 227.368,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36615,
    "c": 0.15177,
    "h": 266.8
  },
  "luminance": 0.04524
}

Semantic roles & 50–950 ramp

primary

#1B338D

secondary

#BDA446

accent

#C63DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1B338D

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

Preview Lab → · Contrast checker → · Palette generator →