#1B258C#1B258C

#1B258C is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.0% C 0.167 H 269.7°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B258C
RGB	rgb(27, 37, 140)
HSL	hsl(235, 68%, 33%)
HSV	hsv(235, 81%, 55%)
CMYK	cmyk(80.7%, 73.6%, 0%, 45.1%)
CIE-LAB	lab(21.76, 34.61, -57.63)
CIE-LCH	lch(21.76, 67.23, 300.99°)
OKLab	oklab(33.98% -0.0009 -0.1669)
OKLCH	oklch(33.98% 0.167 269.7)
XYZ	xyz(5.8456, 3.4489, 25.1635)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B258C #8C821B

analogous

#1B5E8C #1B258C #491B8C

triadic

#1B258C #8C1B25 #258C1B

tetradic

#1B258C #8C1B5E #8C821B #1B8C49

square

#1B258C #8C1B5E #8C821B #1B8C49

split-complementary

#1B258C #8C491B #5E8C1B

monochromatic

#070A25 #111759 #1B258C #2533BF #4653DB

Accessibility & contrast

On white

12.43

#1B258C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B258C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B258C

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B258C	#FFFFFF	#000000	##FFFFFF
##1B258C	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A8F

Deuteranopia (green-blind)

#002F8A

Tritanopia (blue-blind)

#004256

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b258c;
/* rgb */ color: rgb(27, 37, 140);
/* oklch */ color: oklch(34.0% 0.167 269.7);

Tailwind

colors: {
  custom: {
    50: '#6d60af',
    500: '#1b258c',
    950: '#000000',
  },
}

SCSS

$custom: #1b258c;
$custom-light: #6d60af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b258c",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 140
  },
  "hsl": {
    "h": 234.69,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.3398,
    "c": 0.16693,
    "h": 269.7
  },
  "luminance": 0.0345
}

Semantic roles & 50–950 ramp

primary

#1B258C

secondary

#BDB246

accent

#DB3DEB

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080510

muted

#7B797F

Preview Lab

Preview with #1B258C

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

Preview Lab → · Contrast checker → · Palette generator →