#1F257F#1F257F

#1F257F is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.8% C 0.149 H 272.0°. Best body text is #FFFFFF at 12.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F257F
RGB	rgb(31, 37, 127)
HSL	hsl(236, 61%, 31%)
HSV	hsv(236, 76%, 50%)
CMYK	cmyk(75.6%, 70.9%, 0%, 50.2%)
CIE-LAB	lab(20.62, 30.20, -51.33)
CIE-LCH	lch(20.62, 59.56, 300.47°)
OKLab	oklab(32.81% 0.0051 -0.1485)
OKLCH	oklch(32.81% 0.149 272)
XYZ	xyz(5.0561, 3.1462, 20.4154)
Luminance	0.0315 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F257F #7F791F

analogous

#1F557F #1F257F #491F7F

triadic

#1F257F #7F1F25 #257F1F

tetradic

#1F257F #7F1F55 #7F791F #1F7F49

square

#1F257F #7F1F55 #7F791F #1F7F49

split-complementary

#1F257F #7F491F #557F1F

monochromatic

#07081D #13174E #1F257F #2B33B0 #464FD2

Accessibility & contrast

On white

12.89

#1F257F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1F257F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F257F

12.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F257F	#FFFFFF	#000000	##FFFFFF
##1F257F	1.00	12.89	1.63	12.89
#FFFFFF	12.89	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003682

Deuteranopia (green-blind)

#002D7D

Tritanopia (blue-blind)

#003E4F

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f257f;
/* rgb */ color: rgb(31, 37, 127);
/* oklch */ color: oklch(32.8% 0.149 272.0);

Tailwind

colors: {
  custom: {
    50: '#6b60a5',
    500: '#1f257f',
    950: '#000000',
  },
}

SCSS

$custom: #1f257f;
$custom-light: #6b60a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f257f",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 127
  },
  "hsl": {
    "h": 236.25,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.32811,
    "c": 0.14856,
    "h": 272
  },
  "luminance": 0.03147
}

Semantic roles & 50–950 ramp

primary

#1F257F

secondary

#B2AB48

accent

#DA44E4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08050F

muted

#7A797F

Preview Lab

Preview with #1F257F

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

Preview Lab → · Contrast checker → · Palette generator →