#1F4488#1F4488

#1F4488 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.0% C 0.122 H 261.3°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F4488
RGB	rgb(31, 68, 136)
HSL	hsl(219, 63%, 33%)
HSV	hsv(219, 77%, 53%)
CMYK	cmyk(77.2%, 50%, 0%, 46.7%)
CIE-LAB	lab(29.92, 12.41, -41.83)
CIE-LCH	lch(29.92, 43.63, 286.52°)
OKLab	oklab(39.99% -0.0184 -0.1202)
OKLCH	oklch(39.99% 0.122 261.3)
XYZ	xyz(7.0745, 6.2023, 24.1121)
Luminance	0.0620 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4488 #88631F

analogous

#1F7888 #1F4488 #2E1F88

triadic

#1F4488 #881F44 #44881F

tetradic

#1F4488 #881F78 #88631F #1F882E

square

#1F4488 #881F78 #88631F #1F882E

split-complementary

#1F4488 #882E1F #78881F

monochromatic

#081224 #142B56 #1F4488 #2A5DBA #4B7CD6

Accessibility & contrast

On white

9.37

#1F4488 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1F4488 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4488

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4488	#FFFFFF	#000000	##FFFFFF
##1F4488	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4C8B

Deuteranopia (green-blind)

#004287

Tritanopia (blue-blind)

#00545F

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f4488;
/* rgb */ color: rgb(31, 68, 136);
/* oklch */ color: oklch(40.0% 0.122 261.3);

Tailwind

colors: {
  custom: {
    50: '#6b77ab',
    500: '#1f4488',
    950: '#000000',
  },
}

SCSS

$custom: #1f4488;
$custom-light: #6b77ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4488",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 136
  },
  "hsl": {
    "h": 218.857,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39993,
    "c": 0.12157,
    "h": 261.3
  },
  "luminance": 0.06203
}

Semantic roles & 50–950 ramp

primary

#1F4488

secondary

#B9924A

accent

#AC42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1F4488

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

Preview Lab → · Contrast checker → · Palette generator →