#1F256F#1F256F

#1F256F is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.2% C 0.126 H 273.0°. Best body text is #FFFFFF at 13.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F256F
RGB	rgb(31, 37, 111)
HSL	hsl(236, 56%, 28%)
HSV	hsv(236, 72%, 44%)
CMYK	cmyk(72.1%, 66.7%, 0%, 56.5%)
CIE-LAB	lab(19.06, 24.15, -43.64)
CIE-LCH	lch(19.06, 49.88, 298.95°)
OKLab	oklab(31.2% 0.0066 -0.126)
OKLCH	oklch(31.2% 0.126 273)
XYZ	xyz(4.0949, 2.7618, 15.3531)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F256F #6F691F

analogous

#1F4D6F #1F256F #411F6F

triadic

#1F256F #6F1F25 #256F1F

tetradic

#1F256F #6F1F4D #6F691F #1F6F41

square

#1F256F #6F1F4D #6F691F #1F6F41

split-complementary

#1F256F #6F411F #4D6F1F

monochromatic

#070818 #12153F #1F256F #2C359F #3F49C9

Accessibility & contrast

On white

13.53

#1F256F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1F256F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F256F

13.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F256F	#FFFFFF	#000000	##FFFFFF
##1F256F	1.00	13.53	1.55	13.53
#FFFFFF	13.53	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003271

Deuteranopia (green-blind)

#002B6E

Tritanopia (blue-blind)

#003846

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f256f;
/* rgb */ color: rgb(31, 37, 111);
/* oklch */ color: oklch(31.2% 0.126 273.0);

Tailwind

colors: {
  custom: {
    50: '#675f99',
    500: '#1f256f',
    950: '#000000',
  },
}

SCSS

$custom: #1f256f;
$custom-light: #675f99;
$custom-dark: #000000;

JSON

{
  "hex": "#1f256f",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 111
  },
  "hsl": {
    "h": 235.5,
    "s": 56.338,
    "l": 27.843
  },
  "oklch": {
    "l": 0.312,
    "c": 0.12614,
    "h": 273
  },
  "luminance": 0.02762
}

Semantic roles & 50–950 ramp

primary

#1F256F

secondary

#A39C47

accent

#D448E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F256F

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

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