#1F3891#1F3891

#1F3891 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.150 H 266.9°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#1F3891
RGB	rgb(31, 56, 145)
HSL	hsl(227, 65%, 35%)
HSV	hsv(227, 79%, 57%)
CMYK	cmyk(78.6%, 61.4%, 0%, 43.1%)
CIE-LAB	lab(27.19, 24.28, -51.80)
CIE-LCH	lch(27.19, 57.21, 295.11°)
OKLab	oklab(38.16% -0.0082 -0.1497)
OKLCH	oklch(38.16% 0.15 266.9)
XYZ	xyz(7.0883, 5.1632, 27.4056)
Luminance	0.0516 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3891 #91781F

analogous

#1F7191 #1F3891 #3F1F91

triadic

#1F3891 #911F38 #38911F

tetradic

#1F3891 #911F71 #91781F #1F913F

square

#1F3891 #911F71 #91781F #1F913F

split-complementary

#1F3891 #913F1F #71911F

monochromatic

#09112C #14255F #1F3891 #2A4BC3 #516FDA

Accessibility & contrast

On white

10.33

#1F3891 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F3891 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3891

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3891	#FFFFFF	#000000	##FFFFFF
##1F3891	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004694

Deuteranopia (green-blind)

#003B8F

Tritanopia (blue-blind)

#004F5F

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3891;
/* rgb */ color: rgb(31, 56, 145);
/* oklch */ color: oklch(38.2% 0.150 266.9);

Tailwind

colors: {
  custom: {
    50: '#6e6eb2',
    500: '#1f3891',
    950: '#000000',
  },
}

SCSS

$custom: #1f3891;
$custom-light: #6e6eb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3891",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 145
  },
  "hsl": {
    "h": 226.842,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38157,
    "c": 0.14991,
    "h": 266.9
  },
  "luminance": 0.05164
}

Semantic roles & 50–950 ramp

primary

#1F3891

secondary

#BDA54F

accent

#C340E8

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3891

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

Preview Lab → · Contrast checker → · Palette generator →