#1F4489#1F4489

#1F4489 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.1% C 0.123 H 261.5°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#1F4489
RGB	rgb(31, 68, 137)
HSL	hsl(219, 63%, 33%)
HSV	hsv(219, 77%, 54%)
CMYK	cmyk(77.4%, 50.4%, 0%, 46.3%)
CIE-LAB	lab(29.99, 12.81, -42.34)
CIE-LCH	lch(29.99, 44.23, 286.83°)
OKLab	oklab(40.07% -0.0182 -0.1216)
OKLCH	oklch(40.07% 0.123 261.5)
XYZ	xyz(7.1459, 6.2309, 24.4881)
Luminance	0.0623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4489 #89641F

analogous

#1F7989 #1F4489 #2F1F89

triadic

#1F4489 #891F44 #44891F

tetradic

#1F4489 #891F79 #89641F #1F892F

square

#1F4489 #891F79 #89641F #1F892F

split-complementary

#1F4489 #892F1F #79891F

monochromatic

#081225 #142B57 #1F4489 #2A5DBB #4C7CD6

Accessibility & contrast

On white

9.35

#1F4489 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1F4489 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4489

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4489	#FFFFFF	#000000	##FFFFFF
##1F4489	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4C8C

Deuteranopia (green-blind)

#004288

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f4489;
/* rgb */ color: rgb(31, 68, 137);
/* oklch */ color: oklch(40.1% 0.123 261.5);

Tailwind

colors: {
  custom: {
    50: '#6b77ac',
    500: '#1f4489',
    950: '#000000',
  },
}

SCSS

$custom: #1f4489;
$custom-light: #6b77ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4489",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 137
  },
  "hsl": {
    "h": 219.057,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.4007,
    "c": 0.12301,
    "h": 261.5
  },
  "luminance": 0.06232
}

Semantic roles & 50–950 ramp

primary

#1F4489

secondary

#B9934B

accent

#AD42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F4489

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

Preview Lab → · Contrast checker → · Palette generator →