#1F409B#1F409B

#1F409B is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.154 H 265.0°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#1F409B
RGB	rgb(31, 64, 155)
HSL	hsl(224, 67%, 36%)
HSV	hsv(224, 80%, 61%)
CMYK	cmyk(80%, 58.7%, 0%, 39.2%)
CIE-LAB	lab(30.21, 22.74, -52.99)
CIE-LCH	lch(30.21, 57.67, 293.22°)
OKLab	oklab(40.68% -0.0134 -0.1531)
OKLCH	oklch(40.68% 0.154 265)
XYZ	xyz(8.3128, 6.3237, 31.7865)
Luminance	0.0633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F409B #9B7A1F

analogous

#1F7E9B #1F409B #3C1F9B

triadic

#1F409B #9B1F40 #409B1F

tetradic

#1F409B #9B1F7E #9B7A1F #1F9B3C

square

#1F409B #9B1F7E #9B7A1F #1F9B3C

split-complementary

#1F409B #9B3C1F #7E9B1F

monochromatic

#0B1635 #152B68 #1F409B #2955CE #577BDD

Accessibility & contrast

On white

9.27

#1F409B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F409B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F409B

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F409B	#FFFFFF	#000000	##FFFFFF
##1F409B	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9E

Deuteranopia (green-blind)

#004299

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f409b;
/* rgb */ color: rgb(31, 64, 155);
/* oklch */ color: oklch(40.7% 0.154 265.0);

Tailwind

colors: {
  custom: {
    50: '#7074b9',
    500: '#1f409b',
    950: '#000000',
  },
}

SCSS

$custom: #1f409b;
$custom-light: #7074b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f409b",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 155
  },
  "hsl": {
    "h": 224.032,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.40676,
    "c": 0.15365,
    "h": 265
  },
  "luminance": 0.06325
}

Semantic roles & 50–950 ramp

primary

#1F409B

secondary

#C1A455

accent

#BC3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F409B

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

Preview Lab → · Contrast checker → · Palette generator →