#1F2597#1F2597

#1F2597 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.4% C 0.180 H 270.5°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F2597
RGB	rgb(31, 37, 151)
HSL	hsl(237, 66%, 36%)
HSV	hsv(237, 79%, 59%)
CMYK	cmyk(79.5%, 75.5%, 0%, 40.8%)
CIE-LAB	lab(23.16, 38.87, -62.12)
CIE-LCH	lch(23.16, 73.28, 302.04°)
OKLab	oklab(35.39% 0.0017 -0.1799)
OKLCH	oklch(35.39% 0.18 270.5)
XYZ	xyz(6.8107, 3.8480, 29.6560)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2597 #97911F

analogous

#1F6197 #1F2597 #551F97

triadic

#1F2597 #971F25 #25971F

tetradic

#1F2597 #971F61 #97911F #1F9755

square

#1F2597 #971F61 #97911F #1F9755

split-complementary

#1F2597 #97551F #61971F

monochromatic

#0A0C31 #151964 #1F2597 #2931CA #545BDC

Accessibility & contrast

On white

11.87

#1F2597 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F2597 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2597

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2597	#FFFFFF	#000000	##FFFFFF
##1F2597	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9A

Deuteranopia (green-blind)

#003195

Tritanopia (blue-blind)

#00465C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f2597;
/* rgb */ color: rgb(31, 37, 151);
/* oklch */ color: oklch(35.4% 0.180 270.5);

Tailwind

colors: {
  custom: {
    50: '#7161b7',
    500: '#1f2597',
    950: '#000000',
  },
}

SCSS

$custom: #1f2597;
$custom-light: #7161b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2597",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 151
  },
  "hsl": {
    "h": 237,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.35395,
    "c": 0.17991,
    "h": 270.5
  },
  "luminance": 0.03849
}

Semantic roles & 50–950 ramp

primary

#1F2597

secondary

#BFBA52

accent

#E03FE9

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F2597

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

Preview Lab → · Contrast checker → · Palette generator →