#1B248B#1B248B

#1B248B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.7% C 0.167 H 269.9°. Best body text is #FFFFFF at 12.56:1 contrast (WCAG AA passes).

Color values

HEX	#1B248B
RGB	rgb(27, 36, 139)
HSL	hsl(235, 67%, 33%)
HSV	hsv(235, 81%, 55%)
CMYK	cmyk(80.6%, 74.1%, 0%, 45.5%)
CIE-LAB	lab(21.42, 34.87, -57.56)
CIE-LCH	lch(21.42, 67.30, 301.21°)
OKLab	oklab(33.71% -0.0003 -0.1667)
OKLCH	oklch(33.71% 0.167 269.9)
XYZ	xyz(5.7415, 3.3582, 24.7667)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B248B #8B821B

analogous

#1B5C8B #1B248B #4A1B8B

triadic

#1B248B #8B1B24 #248B1B

tetradic

#1B248B #8B1B5C #8B821B #1B8B4A

square

#1B248B #8B1B5C #8B821B #1B8B4A

split-complementary

#1B248B #8B4A1B #5C8B1B

monochromatic

#070925 #111758 #1B248B #2531BE #4551DB

Accessibility & contrast

On white

12.56

#1B248B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B248B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B248B

12.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B248B	#FFFFFF	#000000	##FFFFFF
##1B248B	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)

#00398E

Deuteranopia (green-blind)

#002E89

Tritanopia (blue-blind)

#004255

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b248b;
/* rgb */ color: rgb(27, 36, 139);
/* oklch */ color: oklch(33.7% 0.167 269.9);

Tailwind

colors: {
  custom: {
    50: '#6d5fae',
    500: '#1b248b',
    950: '#000000',
  },
}

SCSS

$custom: #1b248b;
$custom-light: #6d5fae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b248b",
  "rgb": {
    "r": 27,
    "g": 36,
    "b": 139
  },
  "hsl": {
    "h": 235.179,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33708,
    "c": 0.16672,
    "h": 269.9
  },
  "luminance": 0.03359
}

Semantic roles & 50–950 ramp

primary

#1B248B

secondary

#BCB345

accent

#DC3DEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1B248B

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

Preview Lab → · Contrast checker → · Palette generator →