#1B358C#1B358C

#1B358C is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.148 H 266.3°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B358C
RGB	rgb(27, 53, 140)
HSL	hsl(226, 68%, 33%)
HSV	hsv(226, 81%, 55%)
CMYK	cmyk(80.7%, 62.1%, 0%, 45.1%)
CIE-LAB	lab(25.78, 23.94, -51.03)
CIE-LCH	lch(25.78, 56.37, 295.13°)
OKLab	oklab(36.92% -0.0097 -0.1475)
OKLCH	oklch(36.92% 0.148 266.3)
XYZ	xyz(6.4571, 4.6719, 25.3673)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B358C #8C721B

analogous

#1B6D8C #1B358C #3A1B8C

triadic

#1B358C #8C1B35 #358C1B

tetradic

#1B358C #8C1B6D #8C721B #1B8C3A

square

#1B358C #8C1B6D #8C721B #1B8C3A

split-complementary

#1B358C #8C3A1B #6D8C1B

monochromatic

#070E25 #112259 #1B358C #2548BF #4668DB

Accessibility & contrast

On white

10.85

#1B358C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B358C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B358C

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B358C	#FFFFFF	#000000	##FFFFFF
##1B358C	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428F

Deuteranopia (green-blind)

#00388A

Tritanopia (blue-blind)

#004B5B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b358c;
/* rgb */ color: rgb(27, 53, 140);
/* oklch */ color: oklch(36.9% 0.148 266.3);

Tailwind

colors: {
  custom: {
    50: '#6b6bae',
    500: '#1b358c',
    950: '#000000',
  },
}

SCSS

$custom: #1b358c;
$custom-light: #6b6bae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b358c",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 140
  },
  "hsl": {
    "h": 226.195,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.36921,
    "c": 0.14787,
    "h": 266.3
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#1B358C

secondary

#BDA246

accent

#C33DEB

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1B358C

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

Preview Lab → · Contrast checker → · Palette generator →