#1F4288#1F4288

#1F4288 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.5% C 0.124 H 262.3°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#1F4288
RGB	rgb(31, 66, 136)
HSL	hsl(220, 63%, 33%)
HSV	hsv(220, 77%, 53%)
CMYK	cmyk(77.2%, 51.5%, 0%, 46.7%)
CIE-LAB	lab(29.32, 13.78, -42.79)
CIE-LCH	lch(29.32, 44.96, 287.85°)
OKLab	oklab(39.54% -0.0166 -0.123)
OKLCH	oklch(39.54% 0.124 262.3)
XYZ	xyz(6.9556, 5.9645, 24.0725)
Luminance	0.0597 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4288 #88651F

analogous

#1F7688 #1F4288 #301F88

triadic

#1F4288 #881F42 #42881F

tetradic

#1F4288 #881F76 #88651F #1F8830

square

#1F4288 #881F76 #88651F #1F8830

split-complementary

#1F4288 #88301F #76881F

monochromatic

#081224 #142A56 #1F4288 #2A5ABA #4B7AD6

Accessibility & contrast

On white

9.58

#1F4288 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1F4288 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4288

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4288	#FFFFFF	#000000	##FFFFFF
##1F4288	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184A8B

Deuteranopia (green-blind)

#004187

Tritanopia (blue-blind)

#00535E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f4288;
/* rgb */ color: rgb(31, 66, 136);
/* oklch */ color: oklch(39.5% 0.124 262.3);

Tailwind

colors: {
  custom: {
    50: '#6b75ab',
    500: '#1f4288',
    950: '#000000',
  },
}

SCSS

$custom: #1f4288;
$custom-light: #6b75ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4288",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 136
  },
  "hsl": {
    "h": 220,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39539,
    "c": 0.12415,
    "h": 262.3
  },
  "luminance": 0.05965
}

Semantic roles & 50–950 ramp

primary

#1F4288

secondary

#B9944A

accent

#AF42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F4288

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

Preview Lab → · Contrast checker → · Palette generator →