#1D256B#1D256B

#1D256B is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.7% C 0.121 H 272.1°. Best body text is #FFFFFF at 13.73:1 contrast (WCAG AA passes).

Color values

HEX	#1D256B
RGB	rgb(29, 37, 107)
HSL	hsl(234, 57%, 27%)
HSV	hsv(234, 73%, 42%)
CMYK	cmyk(72.9%, 65.4%, 0%, 58%)
CIE-LAB	lab(18.56, 22.30, -41.87)
CIE-LCH	lch(18.56, 47.44, 298.04°)
OKLab	oklab(30.69% 0.0044 -0.1208)
OKLCH	oklch(30.69% 0.121 272.1)
XYZ	xyz(3.8212, 2.6455, 14.2163)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D256B #6B631D

analogous

#1D4C6B #1D256B #3C1D6B

triadic

#1D256B #6B1D25 #256B1D

tetradic

#1D256B #6B1D4C #6B631D #1D6B3C

square

#1D256B #6B1D4C #6B631D #1D6B3C

split-complementary

#1D256B #6B3C1D #4C6B1D

monochromatic

#070818 #10143B #1D256B #2A369B #3948C9

Accessibility & contrast

On white

13.73

#1D256B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1D256B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D256B

13.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D256B	#FFFFFF	#000000	##FFFFFF
##1D256B	1.00	13.73	1.53	13.73
#FFFFFF	13.73	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00316D

Deuteranopia (green-blind)

#002A6A

Tritanopia (blue-blind)

#003744

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1d256b;
/* rgb */ color: rgb(29, 37, 107);
/* oklch */ color: oklch(30.7% 0.121 272.1);

Tailwind

colors: {
  custom: {
    50: '#655f96',
    500: '#1d256b',
    950: '#000000',
  },
}

SCSS

$custom: #1d256b;
$custom-light: #655f96;
$custom-dark: #000000;

JSON

{
  "hex": "#1d256b",
  "rgb": {
    "r": 29,
    "g": 37,
    "b": 107
  },
  "hsl": {
    "h": 233.846,
    "s": 57.353,
    "l": 26.667
  },
  "oklch": {
    "l": 0.30685,
    "c": 0.1209,
    "h": 272.1
  },
  "luminance": 0.02646
}

Semantic roles & 50–950 ramp

primary

#1D256B

secondary

#A09644

accent

#D147E1

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #1D256B

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

Preview Lab → · Contrast checker → · Palette generator →