#1F4C90#1F4C90

#1F4C90 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 42.4% C 0.123 H 258.7°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#1F4C90
RGB	rgb(31, 76, 144)
HSL	hsl(216, 65%, 34%)
HSV	hsv(216, 78%, 56%)
CMYK	cmyk(78.5%, 47.2%, 0%, 43.5%)
CIE-LAB	lab(32.86, 10.17, -42.01)
CIE-LCH	lch(32.86, 43.23, 283.60°)
OKLab	oklab(42.43% -0.024 -0.1205)
OKLCH	oklch(42.43% 0.123 258.7)
XYZ	xyz(8.1817, 7.4729, 27.3914)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4C90 #90631F

analogous

#1F8590 #1F4C90 #2B1F90

triadic

#1F4C90 #901F4C #4C901F

tetradic

#1F4C90 #901F85 #90631F #1F902B

square

#1F4C90 #901F85 #90631F #1F902B

split-complementary

#1F4C90 #902B1F #85901F

monochromatic

#09172B #14315E #1F4C90 #2A67C2 #5087D9

Accessibility & contrast

On white

8.42

#1F4C90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#1F4C90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4C90

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4C90	#FFFFFF	#000000	##FFFFFF
##1F4C90	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#285393

Deuteranopia (green-blind)

#0C488F

Tritanopia (blue-blind)

#005C67

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f4c90;
/* rgb */ color: rgb(31, 76, 144);
/* oklch */ color: oklch(42.4% 0.123 258.7);

Tailwind

colors: {
  custom: {
    50: '#6c7db1',
    500: '#1f4c90',
    950: '#000000',
  },
}

SCSS

$custom: #1f4c90;
$custom-light: #6c7db1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4c90",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 144
  },
  "hsl": {
    "h": 216.106,
    "s": 64.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.4243,
    "c": 0.12291,
    "h": 258.7
  },
  "luminance": 0.07474
}

Semantic roles & 50–950 ramp

primary

#1F4C90

secondary

#BC914E

accent

#A540E8

background

#F7F7FA

surface

#EDEEF5

border

#C8C9CF

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4C90

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

Preview Lab → · Contrast checker → · Palette generator →