#1F4FA4#1F4FA4

#1F4FA4 is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.6% C 0.147 H 260.9°. Best body text is #FFFFFF at 7.74:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FA4
RGB	rgb(31, 79, 164)
HSL	hsl(218, 68%, 38%)
HSV	hsv(218, 81%, 64%)
CMYK	cmyk(81.1%, 51.8%, 0%, 35.7%)
CIE-LAB	lab(35.13, 16.13, -50.45)
CIE-LCH	lch(35.13, 52.96, 287.73°)
OKLab	oklab(44.61% -0.0234 -0.1453)
OKLCH	oklch(44.61% 0.147 260.9)
XYZ	xyz(10.0595, 8.5624, 36.2373)
Luminance	0.0856 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FA4 #A4741F

analogous

#1F91A4 #1F4FA4 #321FA4

triadic

#1F4FA4 #A41F4F #4FA41F

tetradic

#1F4FA4 #A41F91 #A4741F #1FA432

square

#1F4FA4 #A41F91 #A4741F #1FA432

split-complementary

#1F4FA4 #A4321F #91A41F

monochromatic

#0C1D3D #153671 #1F4FA4 #2A68D7 #5D8CE0

Accessibility & contrast

On white

7.74

#1F4FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1F4FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FA4

7.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FA4	#FFFFFF	#000000	##FFFFFF
##1F4FA4	1.00	7.74	2.71	7.74
#FFFFFF	7.74	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1759A7

Deuteranopia (green-blind)

#004DA2

Tritanopia (blue-blind)

#006472

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4fa4;
/* rgb */ color: rgb(31, 79, 164);
/* oklch */ color: oklch(44.6% 0.147 260.9);

Tailwind

colors: {
  custom: {
    50: '#717fc0',
    500: '#1f4fa4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fa4;
$custom-light: #717fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fa4",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 164
  },
  "hsl": {
    "h": 218.346,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.44613,
    "c": 0.14717,
    "h": 260.9
  },
  "luminance": 0.08564
}

Semantic roles & 50–950 ramp

primary

#1F4FA4

secondary

#C59E5A

accent

#AC3DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4FA4

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

Preview Lab → · Contrast checker → · Palette generator →