#1F3587#1F3587

#1F3587 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.6% C 0.140 H 267.4°. Best body text is #FFFFFF at 10.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F3587
RGB	rgb(31, 53, 135)
HSL	hsl(227, 63%, 33%)
HSV	hsv(227, 77%, 53%)
CMYK	cmyk(77%, 60.7%, 0%, 47.1%)
CIE-LAB	lab(25.52, 22.41, -48.34)
CIE-LCH	lch(25.52, 53.28, 294.87°)
OKLab	oklab(36.64% -0.0062 -0.1396)
OKLCH	oklch(36.64% 0.14 267.4)
XYZ	xyz(6.2098, 4.5861, 23.4749)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3587 #87711F

analogous

#1F6987 #1F3587 #3D1F87

triadic

#1F3587 #871F35 #35871F

tetradic

#1F3587 #871F69 #87711F #1F873D

square

#1F3587 #871F69 #87711F #1F873D

split-complementary

#1F3587 #873D1F #69871F

monochromatic

#080E23 #142155 #1F3587 #2A49B9 #4B68D6

Accessibility & contrast

On white

10.95

#1F3587 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1F3587 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3587

10.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3587	#FFFFFF	#000000	##FFFFFF
##1F3587	1.00	10.95	1.92	10.95
#FFFFFF	10.95	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418A

Deuteranopia (green-blind)

#003885

Tritanopia (blue-blind)

#004A58

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f3587;
/* rgb */ color: rgb(31, 53, 135);
/* oklch */ color: oklch(36.6% 0.140 267.4);

Tailwind

colors: {
  custom: {
    50: '#6b6bab',
    500: '#1f3587',
    950: '#000000',
  },
}

SCSS

$custom: #1f3587;
$custom-light: #6b6bab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3587",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 135
  },
  "hsl": {
    "h": 227.308,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.36643,
    "c": 0.1397,
    "h": 267.4
  },
  "luminance": 0.04587
}

Semantic roles & 50–950 ramp

primary

#1F3587

secondary

#B8A14A

accent

#C342E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1F3587

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

Preview Lab → · Contrast checker → · Palette generator →