#1F3590#1F3590

#1F3590 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.152 H 267.7°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F3590
RGB	rgb(31, 53, 144)
HSL	hsl(228, 65%, 34%)
HSV	hsv(228, 78%, 56%)
CMYK	cmyk(78.5%, 63.2%, 0%, 43.5%)
CIE-LAB	lab(26.30, 25.94, -52.64)
CIE-LCH	lch(26.30, 58.68, 296.23°)
OKLab	oklab(37.47% -0.0062 -0.1522)
OKLCH	oklch(37.47% 0.152 267.7)
XYZ	xyz(6.8705, 4.8504, 26.9543)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3590 #907A1F

analogous

#1F6D90 #1F3590 #421F90

triadic

#1F3590 #901F35 #35901F

tetradic

#1F3590 #901F6D #907A1F #1F9042

square

#1F3590 #901F6D #907A1F #1F9042

split-complementary

#1F3590 #90421F #6D901F

monochromatic

#09102B #14225E #1F3590 #2A48C2 #506BD9

Accessibility & contrast

On white

10.66

#1F3590 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F3590 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3590

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3590	#FFFFFF	#000000	##FFFFFF
##1F3590	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004493

Deuteranopia (green-blind)

#00398E

Tritanopia (blue-blind)

#004C5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3590;
/* rgb */ color: rgb(31, 53, 144);
/* oklch */ color: oklch(37.5% 0.152 267.7);

Tailwind

colors: {
  custom: {
    50: '#6e6cb1',
    500: '#1f3590',
    950: '#000000',
  },
}

SCSS

$custom: #1f3590;
$custom-light: #6e6cb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3590",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 144
  },
  "hsl": {
    "h": 228.319,
    "s": 64.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.37468,
    "c": 0.15232,
    "h": 267.7
  },
  "luminance": 0.04851
}

Semantic roles & 50–950 ramp

primary

#1F3590

secondary

#BCA74E

accent

#C740E8

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F3590

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

Preview Lab → · Contrast checker → · Palette generator →