#1B358D#1B358D

#1B358D is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.0% C 0.149 H 266.3°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#1B358D
RGB	rgb(27, 53, 141)
HSL	hsl(226, 68%, 33%)
HSV	hsv(226, 81%, 55%)
CMYK	cmyk(80.9%, 62.4%, 0%, 44.7%)
CIE-LAB	lab(25.87, 24.33, -51.51)
CIE-LCH	lch(25.87, 56.97, 295.29°)
OKLab	oklab(37.01% -0.0097 -0.1489)
OKLCH	oklch(37.01% 0.149 266.3)
XYZ	xyz(6.5311, 4.7015, 25.7574)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B358D #8D731B

analogous

#1B6E8D #1B358D #3A1B8D

triadic

#1B358D #8D1B35 #358D1B

tetradic

#1B358D #8D1B6E #8D731B #1B8D3A

square

#1B358D #8D1B6E #8D731B #1B8D3A

split-complementary

#1B358D #8D3A1B #6E8D1B

monochromatic

#070E26 #11225A #1B358D #2548C0 #4769DC

Accessibility & contrast

On white

10.82

#1B358D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1B358D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B358D

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B358D	#FFFFFF	#000000	##FFFFFF
##1B358D	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004390

Deuteranopia (green-blind)

#00388B

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b358d;
/* rgb */ color: rgb(27, 53, 141);
/* oklch */ color: oklch(37.0% 0.149 266.3);

Tailwind

colors: {
  custom: {
    50: '#6c6baf',
    500: '#1b358d',
    950: '#000000',
  },
}

SCSS

$custom: #1b358d;
$custom-light: #6c6baf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b358d",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 141
  },
  "hsl": {
    "h": 226.316,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.37014,
    "c": 0.14925,
    "h": 266.3
  },
  "luminance": 0.04702
}

Semantic roles & 50–950 ramp

primary

#1B358D

secondary

#BDA246

accent

#C33DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1B358D

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

Preview Lab → · Contrast checker → · Palette generator →