#1F2F9F#1F2F9F

#1F2F9F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.9% C 0.179 H 268.8°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F2F9F
RGB	rgb(31, 47, 159)
HSL	hsl(233, 67%, 37%)
HSV	hsv(233, 81%, 62%)
CMYK	cmyk(80.5%, 70.4%, 0%, 37.6%)
CIE-LAB	lab(26.23, 35.58, -61.95)
CIE-LCH	lch(26.23, 71.44, 299.87°)
OKLab	oklab(37.85% -0.0037 -0.1794)
OKLCH	oklch(37.85% 0.179 268.8)
XYZ	xyz(7.8374, 4.8266, 33.3127)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2F9F #9F8F1F

analogous

#1F6F9F #1F2F9F #4F1F9F

triadic

#1F2F9F #9F1F2F #2F9F1F

tetradic

#1F2F9F #9F1F6F #9F8F1F #1F9F4F

square

#1F2F9F #9F1F6F #9F8F1F #1F9F4F

split-complementary

#1F2F9F #9F4F1F #6F9F1F

monochromatic

#0B1139 #15206C #1F2F9F #293ED2 #5A6ADF

Accessibility & contrast

On white

10.68

#1F2F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F2F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2F9F

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2F9F	#FFFFFF	#000000	##FFFFFF
##1F2F9F	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A2

Deuteranopia (green-blind)

#00389D

Tritanopia (blue-blind)

#004E63

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f2f9f;
/* rgb */ color: rgb(31, 47, 159);
/* oklch */ color: oklch(37.9% 0.179 268.8);

Tailwind

colors: {
  custom: {
    50: '#7268bc',
    500: '#1f2f9f',
    950: '#000000',
  },
}

SCSS

$custom: #1f2f9f;
$custom-light: #7268bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2f9f",
  "rgb": {
    "r": 31,
    "g": 47,
    "b": 159
  },
  "hsl": {
    "h": 232.5,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.37852,
    "c": 0.17947,
    "h": 268.8
  },
  "luminance": 0.04828
}

Semantic roles & 50–950 ramp

primary

#1F2F9F

secondary

#C3B557

accent

#D53EEA

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F2F9F

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

Preview Lab → · Contrast checker → · Palette generator →