#1F256E#1F256E

#1F256E is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.1% C 0.125 H 273.1°. Best body text is #FFFFFF at 13.57:1 contrast (WCAG AA passes).

Color values

HEX	#1F256E
RGB	rgb(31, 37, 110)
HSL	hsl(235, 56%, 28%)
HSV	hsv(235, 72%, 43%)
CMYK	cmyk(71.8%, 66.4%, 0%, 56.9%)
CIE-LAB	lab(18.97, 23.76, -43.15)
CIE-LCH	lch(18.97, 49.26, 298.84°)
OKLab	oklab(31.1% 0.0067 -0.1245)
OKLCH	oklch(31.1% 0.125 273.1)
XYZ	xyz(4.0402, 2.7399, 15.0648)
Luminance	0.0274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F256E #6E681F

analogous

#1F4C6E #1F256E #401F6E

triadic

#1F256E #6E1F25 #256E1F

tetradic

#1F256E #6E1F4C #6E681F #1F6E40

square

#1F256E #6E1F4C #6E681F #1F6E40

split-complementary

#1F256E #6E401F #4C6E1F

monochromatic

#070818 #12153E #1F256E #2C359E #3F49C9

Accessibility & contrast

On white

13.57

#1F256E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1F256E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F256E

13.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F256E	#FFFFFF	#000000	##FFFFFF
##1F256E	1.00	13.57	1.55	13.57
#FFFFFF	13.57	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003270

Deuteranopia (green-blind)

#002B6D

Tritanopia (blue-blind)

#003845

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f256e;
/* rgb */ color: rgb(31, 37, 110);
/* oklch */ color: oklch(31.1% 0.125 273.1);

Tailwind

colors: {
  custom: {
    50: '#665f98',
    500: '#1f256e',
    950: '#000000',
  },
}

SCSS

$custom: #1f256e;
$custom-light: #665f98;
$custom-dark: #000000;

JSON

{
  "hex": "#1f256e",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 110
  },
  "hsl": {
    "h": 235.443,
    "s": 56.028,
    "l": 27.647
  },
  "oklch": {
    "l": 0.31103,
    "c": 0.1247,
    "h": 273.1
  },
  "luminance": 0.0274
}

Semantic roles & 50–950 ramp

primary

#1F256E

secondary

#A29B47

accent

#D448DF

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F256E

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

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