#1B238D#1B238D

#1B238D is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.8% C 0.170 H 269.9°. Best body text is #FFFFFF at 12.56:1 contrast (WCAG AA passes).

Color values

HEX	#1B238D
RGB	rgb(27, 35, 141)
HSL	hsl(236, 68%, 33%)
HSV	hsv(236, 81%, 55%)
CMYK	cmyk(80.9%, 75.2%, 0%, 44.7%)
CIE-LAB	lab(21.42, 36.21, -58.81)
CIE-LCH	lch(21.42, 69.07, 301.62°)
OKLab	oklab(33.77% -0.0002 -0.1703)
OKLCH	oklch(33.77% 0.17 269.9)
XYZ	xyz(5.8591, 3.3575, 25.5334)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B238D #8D851B

analogous

#1B5C8D #1B238D #4C1B8D

triadic

#1B238D #8D1B23 #238D1B

tetradic

#1B238D #8D1B5C #8D851B #1B8D4C

square

#1B238D #8D1B5C #8D851B #1B8D4C

split-complementary

#1B238D #8D4C1B #5C8D1B

monochromatic

#070A26 #11165A #1B238D #2530C0 #4751DC

Accessibility & contrast

On white

12.56

#1B238D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B238D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B238D

12.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B238D	#FFFFFF	#000000	##FFFFFF
##1B238D	1.00	12.56	1.67	12.56
#FFFFFF	12.56	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003990

Deuteranopia (green-blind)

#002E8B

Tritanopia (blue-blind)

#004256

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b238d;
/* rgb */ color: rgb(27, 35, 141);
/* oklch */ color: oklch(33.8% 0.170 269.9);

Tailwind

colors: {
  custom: {
    50: '#6d5faf',
    500: '#1b238d',
    950: '#000000',
  },
}

SCSS

$custom: #1b238d;
$custom-light: #6d5faf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b238d",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 141
  },
  "hsl": {
    "h": 235.789,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33772,
    "c": 0.17035,
    "h": 269.9
  },
  "luminance": 0.03358
}

Semantic roles & 50–950 ramp

primary

#1B238D

secondary

#BDB546

accent

#DF3DEB

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #1B238D

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

Preview Lab → · Contrast checker → · Palette generator →