#1F257D#1F257D

#1F257D is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.6% C 0.146 H 272.1°. Best body text is #FFFFFF at 12.97:1 contrast (WCAG AA passes).

Color values

HEX	#1F257D
RGB	rgb(31, 37, 125)
HSL	hsl(236, 60%, 31%)
HSV	hsv(236, 75%, 49%)
CMYK	cmyk(75.2%, 70.4%, 0%, 51%)
CIE-LAB	lab(20.42, 29.45, -50.40)
CIE-LCH	lch(20.42, 58.37, 300.31°)
OKLab	oklab(32.6% 0.0054 -0.1457)
OKLCH	oklch(32.6% 0.146 272.1)
XYZ	xyz(4.9271, 3.0946, 19.7357)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F257D #7D771F

analogous

#1F547D #1F257D #481F7D

triadic

#1F257D #7D1F25 #257D1F

tetradic

#1F257D #7D1F54 #7D771F #1F7D48

square

#1F257D #7D1F54 #7D771F #1F7D48

split-complementary

#1F257D #7D481F #547D1F

monochromatic

#07081B #13164C #1F257D #2B34AE #454ED1

Accessibility & contrast

On white

12.97

#1F257D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F257D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F257D

12.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F257D	#FFFFFF	#000000	##FFFFFF
##1F257D	1.00	12.97	1.62	12.97
#FFFFFF	12.97	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003680

Deuteranopia (green-blind)

#002D7B

Tritanopia (blue-blind)

#003D4D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f257d;
/* rgb */ color: rgb(31, 37, 125);
/* oklch */ color: oklch(32.6% 0.146 272.1);

Tailwind

colors: {
  custom: {
    50: '#6a60a4',
    500: '#1f257d',
    950: '#000000',
  },
}

SCSS

$custom: #1f257d;
$custom-light: #6a60a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f257d",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 125
  },
  "hsl": {
    "h": 236.17,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.32604,
    "c": 0.14583,
    "h": 272.1
  },
  "luminance": 0.03095
}

Semantic roles & 50–950 ramp

primary

#1F257D

secondary

#B0A948

accent

#D944E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F257D

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

Preview Lab → · Contrast checker → · Palette generator →