#1B258B#1B258B

#1B258B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.9% C 0.166 H 269.7°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B258B
RGB	rgb(27, 37, 139)
HSL	hsl(235, 67%, 33%)
HSV	hsv(235, 81%, 55%)
CMYK	cmyk(80.6%, 73.4%, 0%, 45.5%)
CIE-LAB	lab(21.65, 34.24, -57.19)
CIE-LCH	lch(21.65, 66.65, 300.91°)
OKLab	oklab(33.87% -0.0008 -0.1656)
OKLCH	oklch(33.87% 0.166 269.7)
XYZ	xyz(5.7722, 3.4196, 24.7769)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B258B #8B811B

analogous

#1B5D8B #1B258B #491B8B

triadic

#1B258B #8B1B25 #258B1B

tetradic

#1B258B #8B1B5D #8B811B #1B8B49

square

#1B258B #8B1B5D #8B811B #1B8B49

split-complementary

#1B258B #8B491B #5D8B1B

monochromatic

#070A25 #111758 #1B258B #2533BE #4553DB

Accessibility & contrast

On white

12.47

#1B258B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B258B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B258B

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B258B	#FFFFFF	#000000	##FFFFFF
##1B258B	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00398E

Deuteranopia (green-blind)

#002E89

Tritanopia (blue-blind)

#004255

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b258b;
/* rgb */ color: rgb(27, 37, 139);
/* oklch */ color: oklch(33.9% 0.166 269.7);

Tailwind

colors: {
  custom: {
    50: '#6d60ae',
    500: '#1b258b',
    950: '#000000',
  },
}

SCSS

$custom: #1b258b;
$custom-light: #6d60ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b258b",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 139
  },
  "hsl": {
    "h": 234.643,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33871,
    "c": 0.16563,
    "h": 269.7
  },
  "luminance": 0.0342
}

Semantic roles & 50–950 ramp

primary

#1B258B

secondary

#BCB245

accent

#DB3DEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1B258B

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

Preview Lab → · Contrast checker → · Palette generator →