#1F3597#1F3597

#1F3597 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.1% C 0.162 H 267.8°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#1F3597
RGB	rgb(31, 53, 151)
HSL	hsl(229, 66%, 36%)
HSV	hsv(229, 79%, 59%)
CMYK	cmyk(79.5%, 64.9%, 0%, 40.8%)
CIE-LAB	lab(26.94, 28.64, -55.91)
CIE-LCH	lch(26.94, 62.82, 297.13°)
OKLab	oklab(38.13% -0.0063 -0.1618)
OKLCH	oklch(38.13% 0.162 267.8)
XYZ	xyz(7.4221, 5.0710, 29.8598)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3597 #97811F

analogous

#1F7197 #1F3597 #451F97

triadic

#1F3597 #971F35 #35971F

tetradic

#1F3597 #971F71 #97811F #1F9745

square

#1F3597 #971F71 #97811F #1F9745

split-complementary

#1F3597 #97451F #71971F

monochromatic

#0A1131 #152364 #1F3597 #2947CA #546DDC

Accessibility & contrast

On white

10.42

#1F3597 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F3597 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3597

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3597	#FFFFFF	#000000	##FFFFFF
##1F3597	1.00	10.42	2.01	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459A

Deuteranopia (green-blind)

#003A95

Tritanopia (blue-blind)

#004F61

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3597;
/* rgb */ color: rgb(31, 53, 151);
/* oklch */ color: oklch(38.1% 0.162 267.8);

Tailwind

colors: {
  custom: {
    50: '#706cb7',
    500: '#1f3597',
    950: '#000000',
  },
}

SCSS

$custom: #1f3597;
$custom-light: #706cb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3597",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 151
  },
  "hsl": {
    "h": 229,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.3813,
    "c": 0.16189,
    "h": 267.8
  },
  "luminance": 0.05072
}

Semantic roles & 50–950 ramp

primary

#1F3597

secondary

#BFAB52

accent

#CA3FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3597

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

Preview Lab → · Contrast checker → · Palette generator →