#1F256C#1F256C

#1F256C is a dark, vivid blue. Relative luminance 0.027; OKLCH L 30.9% C 0.122 H 273.2°. Best body text is #FFFFFF at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F256C
RGB	rgb(31, 37, 108)
HSL	hsl(235, 55%, 27%)
HSV	hsv(235, 71%, 42%)
CMYK	cmyk(71.3%, 65.7%, 0%, 57.6%)
CIE-LAB	lab(18.79, 22.99, -42.15)
CIE-LCH	lch(18.79, 48.01, 298.61°)
OKLab	oklab(30.91% 0.0068 -0.1216)
OKLCH	oklch(30.91% 0.122 273.2)
XYZ	xyz(3.9325, 2.6968, 14.4977)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F256C #6C661F

analogous

#1F4B6C #1F256C #401F6C

triadic

#1F256C #6C1F25 #256C1F

tetradic

#1F256C #6C1F4B #6C661F #1F6C40

square

#1F256C #6C1F4B #6C661F #1F6C40

split-complementary

#1F256C #6C401F #4B6C1F

monochromatic

#070818 #11153C #1F256C #2D359C #3E49C8

Accessibility & contrast

On white

13.64

#1F256C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F256C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F256C

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F256C	#FFFFFF	#000000	##FFFFFF
##1F256C	1.00	13.64	1.54	13.64
#FFFFFF	13.64	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00316E

Deuteranopia (green-blind)

#002A6B

Tritanopia (blue-blind)

#003744

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f256c;
/* rgb */ color: rgb(31, 37, 108);
/* oklch */ color: oklch(30.9% 0.122 273.2);

Tailwind

colors: {
  custom: {
    50: '#665f97',
    500: '#1f256c',
    950: '#000000',
  },
}

SCSS

$custom: #1f256c;
$custom-light: #665f97;
$custom-dark: #000000;

JSON

{
  "hex": "#1f256c",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 108
  },
  "hsl": {
    "h": 235.325,
    "s": 55.396,
    "l": 27.255
  },
  "oklch": {
    "l": 0.30911,
    "c": 0.12178,
    "h": 273.2
  },
  "luminance": 0.02697
}

Semantic roles & 50–950 ramp

primary

#1F256C

secondary

#A09947

accent

#D349DF

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040D

muted

#7A797E

Preview Lab

Preview with #1F256C

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

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