#1F256B#1F256B

#1F256B is a dark, vivid blue. Relative luminance 0.027; OKLCH L 30.8% C 0.120 H 273.3°. Best body text is #FFFFFF at 13.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F256B
RGB	rgb(31, 37, 107)
HSL	hsl(235, 55%, 27%)
HSV	hsv(235, 71%, 42%)
CMYK	cmyk(71%, 65.4%, 0%, 58%)
CIE-LAB	lab(18.69, 22.61, -41.65)
CIE-LCH	lch(18.69, 47.39, 298.49°)
OKLab	oklab(30.82% 0.0068 -0.1201)
OKLCH	oklch(30.82% 0.12 273.3)
XYZ	xyz(3.8796, 2.6756, 14.2191)
Luminance	0.0268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F256B #6B651F

analogous

#1F4B6B #1F256B #3F1F6B

triadic

#1F256B #6B1F25 #256B1F

tetradic

#1F256B #6B1F4B #6B651F #1F6B3F

square

#1F256B #6B1F4B #6B651F #1F6B3F

split-complementary

#1F256B #6B3F1F #4B6B1F

monochromatic

#070818 #11153C #1F256B #2D359A #3D48C7

Accessibility & contrast

On white

13.68

#1F256B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F256B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F256B

13.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F256B	#FFFFFF	#000000	##FFFFFF
##1F256B	1.00	13.68	1.54	13.68
#FFFFFF	13.68	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.68	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: #1f256b;
/* rgb */ color: rgb(31, 37, 107);
/* oklch */ color: oklch(30.8% 0.120 273.3);

Tailwind

colors: {
  custom: {
    50: '#665f96',
    500: '#1f256b',
    950: '#000000',
  },
}

SCSS

$custom: #1f256b;
$custom-light: #665f96;
$custom-dark: #000000;

JSON

{
  "hex": "#1f256b",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 107
  },
  "hsl": {
    "h": 235.263,
    "s": 55.072,
    "l": 27.059
  },
  "oklch": {
    "l": 0.30816,
    "c": 0.12031,
    "h": 273.3
  },
  "luminance": 0.02676
}

Semantic roles & 50–950 ramp

primary

#1F256B

secondary

#9F9847

accent

#D349DE

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #1F256B

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

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