#1F256D#1F256D

#1F256D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.0% C 0.123 H 273.1°. Best body text is #FFFFFF at 13.60:1 contrast (WCAG AA passes).

Color values

HEX	#1F256D
RGB	rgb(31, 37, 109)
HSL	hsl(235, 56%, 27%)
HSV	hsv(235, 72%, 43%)
CMYK	cmyk(71.6%, 66.1%, 0%, 57.3%)
CIE-LAB	lab(18.88, 23.38, -42.65)
CIE-LCH	lch(18.88, 48.64, 298.73°)
OKLab	oklab(31.01% 0.0067 -0.1231)
OKLCH	oklch(31.01% 0.123 273.1)
XYZ	xyz(3.9860, 2.7182, 14.7796)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F256D #6D671F

analogous

#1F4C6D #1F256D #401F6D

triadic

#1F256D #6D1F25 #256D1F

tetradic

#1F256D #6D1F4C #6D671F #1F6D40

square

#1F256D #6D1F4C #6D671F #1F6D40

split-complementary

#1F256D #6D401F #4C6D1F

monochromatic

#070818 #11153D #1F256D #2D359D #3E49C8

Accessibility & contrast

On white

13.60

#1F256D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F256D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F256D

13.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F256D	#FFFFFF	#000000	##FFFFFF
##1F256D	1.00	13.60	1.54	13.60
#FFFFFF	13.60	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00316F

Deuteranopia (green-blind)

#002A6C

Tritanopia (blue-blind)

#003745

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f256d;
/* rgb */ color: rgb(31, 37, 109);
/* oklch */ color: oklch(31.0% 0.123 273.1);

Tailwind

colors: {
  custom: {
    50: '#665f98',
    500: '#1f256d',
    950: '#000000',
  },
}

SCSS

$custom: #1f256d;
$custom-light: #665f98;
$custom-dark: #000000;

JSON

{
  "hex": "#1f256d",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 109
  },
  "hsl": {
    "h": 235.385,
    "s": 55.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.31007,
    "c": 0.12324,
    "h": 273.1
  },
  "luminance": 0.02719
}

Semantic roles & 50–950 ramp

primary

#1F256D

secondary

#A19A47

accent

#D349DF

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #1F256D

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

Preview Lab → · Contrast checker → · Palette generator →