#1F3887#1F3887

#1F3887 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.3% C 0.136 H 266.4°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3887
RGB	rgb(31, 56, 135)
HSL	hsl(226, 63%, 33%)
HSV	hsv(226, 77%, 53%)
CMYK	cmyk(77%, 58.5%, 0%, 47.1%)
CIE-LAB	lab(26.36, 20.33, -46.98)
CIE-LCH	lch(26.36, 51.19, 293.40°)
OKLab	oklab(37.27% -0.0085 -0.1355)
OKLCH	oklch(37.27% 0.136 266.4)
XYZ	xyz(6.3509, 4.8682, 23.5219)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3887 #876E1F

analogous

#1F6C87 #1F3887 #3A1F87

triadic

#1F3887 #871F38 #38871F

tetradic

#1F3887 #871F6C #876E1F #1F873A

square

#1F3887 #871F6C #876E1F #1F873A

split-complementary

#1F3887 #873A1F #6C871F

monochromatic

#080F23 #142355 #1F3887 #2A4DB9 #4B6CD6

Accessibility & contrast

On white

10.64

#1F3887 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F3887 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3887

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3887	#FFFFFF	#000000	##FFFFFF
##1F3887	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438A

Deuteranopia (green-blind)

#003A85

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3887;
/* rgb */ color: rgb(31, 56, 135);
/* oklch */ color: oklch(37.3% 0.136 266.4);

Tailwind

colors: {
  custom: {
    50: '#6b6eab',
    500: '#1f3887',
    950: '#000000',
  },
}

SCSS

$custom: #1f3887;
$custom-light: #6b6eab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3887",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 135
  },
  "hsl": {
    "h": 225.577,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37268,
    "c": 0.13579,
    "h": 266.4
  },
  "luminance": 0.04869
}

Semantic roles & 50–950 ramp

primary

#1F3887

secondary

#B89E4A

accent

#BE42E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3887

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

Preview Lab → · Contrast checker → · Palette generator →