#1F257E#1F257E

#1F257E is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.7% C 0.147 H 272.0°. Best body text is #FFFFFF at 12.93:1 contrast (WCAG AA passes).

Color values

HEX	#1F257E
RGB	rgb(31, 37, 126)
HSL	hsl(236, 61%, 31%)
HSV	hsv(236, 75%, 49%)
CMYK	cmyk(75.4%, 70.6%, 0%, 50.6%)
CIE-LAB	lab(20.52, 29.83, -50.86)
CIE-LCH	lch(20.52, 58.97, 300.39°)
OKLab	oklab(32.71% 0.0052 -0.1471)
OKLCH	oklch(32.71% 0.147 272)
XYZ	xyz(4.9913, 3.1203, 20.0738)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F257E #7E781F

analogous

#1F547E #1F257E #481F7E

triadic

#1F257E #7E1F25 #257E1F

tetradic

#1F257E #7E1F54 #7E781F #1F7E48

square

#1F257E #7E1F54 #7E781F #1F7E48

split-complementary

#1F257E #7E481F #547E1F

monochromatic

#07081C #13174D #1F257E #2B33AF #464FD1

Accessibility & contrast

On white

12.93

#1F257E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F257E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F257E

12.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F257E	#FFFFFF	#000000	##FFFFFF
##1F257E	1.00	12.93	1.62	12.93
#FFFFFF	12.93	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003681

Deuteranopia (green-blind)

#002D7C

Tritanopia (blue-blind)

#003D4E

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f257e;
/* rgb */ color: rgb(31, 37, 126);
/* oklch */ color: oklch(32.7% 0.147 272.0);

Tailwind

colors: {
  custom: {
    50: '#6b60a4',
    500: '#1f257e',
    950: '#000000',
  },
}

SCSS

$custom: #1f257e;
$custom-light: #6b60a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f257e",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 126
  },
  "hsl": {
    "h": 236.211,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.32707,
    "c": 0.1472,
    "h": 272
  },
  "luminance": 0.03121
}

Semantic roles & 50–950 ramp

primary

#1F257E

secondary

#B1AA48

accent

#DA44E4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08050F

muted

#7A797F

Preview Lab

Preview with #1F257E

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

Preview Lab → · Contrast checker → · Palette generator →