#1F439C#1F439C

#1F439C is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.4% C 0.151 H 264.2°. Best body text is #FFFFFF at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#1F439C
RGB	rgb(31, 67, 156)
HSL	hsl(223, 67%, 37%)
HSV	hsv(223, 80%, 61%)
CMYK	cmyk(80.1%, 57.1%, 0%, 38.8%)
CIE-LAB	lab(31.13, 21.09, -52.12)
CIE-LCH	lch(31.13, 56.22, 292.03°)
OKLab	oklab(41.39% -0.0154 -0.1504)
OKLCH	oklch(41.39% 0.151 264.2)
XYZ	xyz(8.5708, 6.7049, 32.2885)
Luminance	0.0671 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F439C #9C781F

analogous

#1F829C #1F439C #3A1F9C

triadic

#1F439C #9C1F43 #439C1F

tetradic

#1F439C #9C1F82 #9C781F #1F9C3A

square

#1F439C #9C1F82 #9C781F #1F9C3A

split-complementary

#1F439C #9C3A1F #829C1F

monochromatic

#0B1736 #152D69 #1F439C #2959CF #587EDE

Accessibility & contrast

On white

8.97

#1F439C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1F439C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F439C

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F439C	#FFFFFF	#000000	##FFFFFF
##1F439C	1.00	8.97	2.34	8.97
#FFFFFF	8.97	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9F

Deuteranopia (green-blind)

#00449A

Tritanopia (blue-blind)

#005969

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f439c;
/* rgb */ color: rgb(31, 67, 156);
/* oklch */ color: oklch(41.4% 0.151 264.2);

Tailwind

colors: {
  custom: {
    50: '#7076ba',
    500: '#1f439c',
    950: '#000000',
  },
}

SCSS

$custom: #1f439c;
$custom-light: #7076ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f439c",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 156
  },
  "hsl": {
    "h": 222.72,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.41386,
    "c": 0.15123,
    "h": 264.2
  },
  "luminance": 0.06706
}

Semantic roles & 50–950 ramp

primary

#1F439C

secondary

#C1A255

accent

#B83EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F439C

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

Preview Lab → · Contrast checker → · Palette generator →