#1D258B#1D258B

#1D258B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.0% C 0.165 H 270.5°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1D258B
RGB	rgb(29, 37, 139)
HSL	hsl(236, 65%, 33%)
HSV	hsv(236, 79%, 55%)
CMYK	cmyk(79.1%, 73.4%, 0%, 45.5%)
CIE-LAB	lab(21.75, 34.42, -57.01)
CIE-LCH	lch(21.75, 66.60, 301.12°)
OKLab	oklab(33.97% 0.0013 -0.1651)
OKLCH	oklch(33.97% 0.165 270.5)
XYZ	xyz(5.8269, 3.4478, 24.7795)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D258B #8B831D

analogous

#1D5C8B #1D258B #4C1D8B

triadic

#1D258B #8B1D25 #258B1D

tetradic

#1D258B #8B1D5C #8B831D #1D8B4C

square

#1D258B #8B1D5C #8B831D #1D8B4C

split-complementary

#1D258B #8B4C1D #5C8B1D

monochromatic

#080A26 #121858 #1D258B #2832BE #4954D9

Accessibility & contrast

On white

12.43

#1D258B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1D258B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D258B

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D258B	#FFFFFF	#000000	##FFFFFF
##1D258B	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)

#00398E

Deuteranopia (green-blind)

#002F89

Tritanopia (blue-blind)

#004255

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1d258b;
/* rgb */ color: rgb(29, 37, 139);
/* oklch */ color: oklch(34.0% 0.165 270.5);

Tailwind

colors: {
  custom: {
    50: '#6d60ae',
    500: '#1d258b',
    950: '#000000',
  },
}

SCSS

$custom: #1d258b;
$custom-light: #6d60ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d258b",
  "rgb": {
    "r": 29,
    "g": 37,
    "b": 139
  },
  "hsl": {
    "h": 235.636,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33973,
    "c": 0.16509,
    "h": 270.5
  },
  "luminance": 0.03448
}

Semantic roles & 50–950 ramp

primary

#1D258B

secondary

#BBB349

accent

#DC3FE8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1D258B

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

Preview Lab → · Contrast checker → · Palette generator →