#1F2587#1F2587

#1F2587 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.7% C 0.159 H 271.5°. Best body text is #FFFFFF at 12.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F2587
RGB	rgb(31, 37, 135)
HSL	hsl(237, 63%, 33%)
HSV	hsv(237, 77%, 53%)
CMYK	cmyk(77%, 72.6%, 0%, 47.1%)
CIE-LAB	lab(21.44, 33.15, -55.02)
CIE-LCH	lch(21.44, 64.23, 301.07°)
OKLab	oklab(33.65% 0.0041 -0.1592)
OKLCH	oklch(33.65% 0.159 271.5)
XYZ	xyz(5.5983, 3.3631, 23.2711)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2587 #87811F

analogous

#1F5987 #1F2587 #4D1F87

triadic

#1F2587 #871F25 #25871F

tetradic

#1F2587 #871F59 #87811F #1F874D

square

#1F2587 #871F59 #87811F #1F874D

split-complementary

#1F2587 #874D1F #59871F

monochromatic

#080A23 #141755 #1F2587 #2A33B9 #4B53D6

Accessibility & contrast

On white

12.55

#1F2587 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1F2587 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2587

12.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2587	#FFFFFF	#000000	##FFFFFF
##1F2587	1.00	12.55	1.67	12.55
#FFFFFF	12.55	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388A

Deuteranopia (green-blind)

#002E85

Tritanopia (blue-blind)

#004053

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f2587;
/* rgb */ color: rgb(31, 37, 135);
/* oklch */ color: oklch(33.7% 0.159 271.5);

Tailwind

colors: {
  custom: {
    50: '#6d60ab',
    500: '#1f2587',
    950: '#000000',
  },
}

SCSS

$custom: #1f2587;
$custom-light: #6d60ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2587",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 135
  },
  "hsl": {
    "h": 236.538,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33653,
    "c": 0.15928,
    "h": 271.5
  },
  "luminance": 0.03364
}

Semantic roles & 50–950 ramp

primary

#1F2587

secondary

#B8B24A

accent

#DC42E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F2587

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

Preview Lab → · Contrast checker → · Palette generator →