#1F439F#1F439F

#1F439F is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.6% C 0.155 H 264.4°. Best body text is #FFFFFF at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F439F
RGB	rgb(31, 67, 159)
HSL	hsl(223, 67%, 37%)
HSV	hsv(223, 81%, 62%)
CMYK	cmyk(80.5%, 57.9%, 0%, 37.6%)
CIE-LAB	lab(31.37, 22.27, -53.55)
CIE-LCH	lch(31.37, 57.99, 292.59°)
OKLab	oklab(41.64% -0.0152 -0.1546)
OKLCH	oklch(41.64% 0.155 264.4)
XYZ	xyz(8.8280, 6.8078, 33.6429)
Luminance	0.0681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F439F #9F7B1F

analogous

#1F839F #1F439F #3B1F9F

triadic

#1F439F #9F1F43 #439F1F

tetradic

#1F439F #9F1F83 #9F7B1F #1F9F3B

square

#1F439F #9F1F83 #9F7B1F #1F9F3B

split-complementary

#1F439F #9F3B1F #839F1F

monochromatic

#0B1839 #152D6C #1F439F #2959D2 #5A7FDF

Accessibility & contrast

On white

8.89

#1F439F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1F439F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F439F

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F439F	#FFFFFF	#000000	##FFFFFF
##1F439F	1.00	8.89	2.36	8.89
#FFFFFF	8.89	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A2

Deuteranopia (green-blind)

#00449D

Tritanopia (blue-blind)

#005A6A

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f439f;
/* rgb */ color: rgb(31, 67, 159);
/* oklch */ color: oklch(41.6% 0.155 264.4);

Tailwind

colors: {
  custom: {
    50: '#7076bc',
    500: '#1f439f',
    950: '#000000',
  },
}

SCSS

$custom: #1f439f;
$custom-light: #7076bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f439f",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 159
  },
  "hsl": {
    "h": 223.125,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.41641,
    "c": 0.15538,
    "h": 264.4
  },
  "luminance": 0.06809
}

Semantic roles & 50–950 ramp

primary

#1F439F

secondary

#C3A457

accent

#BA3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F439F

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

Preview Lab → · Contrast checker → · Palette generator →