#1F4187#1F4187

#1F4187 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.2% C 0.124 H 262.6°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F4187
RGB	rgb(31, 65, 135)
HSL	hsl(220, 63%, 33%)
HSV	hsv(220, 77%, 53%)
CMYK	cmyk(77%, 51.9%, 0%, 47.1%)
CIE-LAB	lab(28.95, 14.07, -42.77)
CIE-LCH	lch(28.95, 45.02, 288.21°)
OKLab	oklab(39.24% -0.0159 -0.123)
OKLCH	oklch(39.24% 0.124 262.6)
XYZ	xyz(6.8270, 5.8204, 23.6806)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4187 #87651F

analogous

#1F7587 #1F4187 #311F87

triadic

#1F4187 #871F41 #41871F

tetradic

#1F4187 #871F75 #87651F #1F8731

square

#1F4187 #871F75 #87651F #1F8731

split-complementary

#1F4187 #87311F #75871F

monochromatic

#081123 #142955 #1F4187 #2A59B9 #4B78D6

Accessibility & contrast

On white

9.70

#1F4187 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1F4187 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4187

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4187	#FFFFFF	#000000	##FFFFFF
##1F4187	1.00	9.70	2.16	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16498A

Deuteranopia (green-blind)

#004086

Tritanopia (blue-blind)

#00525D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f4187;
/* rgb */ color: rgb(31, 65, 135);
/* oklch */ color: oklch(39.2% 0.124 262.6);

Tailwind

colors: {
  custom: {
    50: '#6b75aa',
    500: '#1f4187',
    950: '#000000',
  },
}

SCSS

$custom: #1f4187;
$custom-light: #6b75aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4187",
  "rgb": {
    "r": 31,
    "g": 65,
    "b": 135
  },
  "hsl": {
    "h": 220.385,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.39235,
    "c": 0.12399,
    "h": 262.6
  },
  "luminance": 0.05821
}

Semantic roles & 50–950 ramp

primary

#1F4187

secondary

#B8944A

accent

#B042E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1F4187

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

Preview Lab → · Contrast checker → · Palette generator →