#1F4FA0#1F4FA0

#1F4FA0 is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.3% C 0.142 H 260.3°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FA0
RGB	rgb(31, 79, 160)
HSL	hsl(218, 68%, 37%)
HSV	hsv(218, 81%, 63%)
CMYK	cmyk(80.6%, 50.6%, 0%, 37.3%)
CIE-LAB	lab(34.84, 14.54, -48.51)
CIE-LCH	lch(34.84, 50.64, 286.68°)
OKLab	oklab(44.31% -0.0239 -0.1396)
OKLCH	oklch(44.31% 0.142 260.3)
XYZ	xyz(9.7039, 8.4202, 34.3647)
Luminance	0.0842 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FA0 #A0701F

analogous

#1F90A0 #1F4FA0 #2F1FA0

triadic

#1F4FA0 #A01F4F #4FA01F

tetradic

#1F4FA0 #A01F90 #A0701F #1FA02F

square

#1F4FA0 #A01F90 #A0701F #1FA02F

split-complementary

#1F4FA0 #A02F1F #90A01F

monochromatic

#0B1C39 #15366D #1F4FA0 #2968D3 #5A8CDF

Accessibility & contrast

On white

7.82

#1F4FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#1F4FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FA0

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FA0	#FFFFFF	#000000	##FFFFFF
##1F4FA0	1.00	7.82	2.68	7.82
#FFFFFF	7.82	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D58A3

Deuteranopia (green-blind)

#004C9E

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4fa0;
/* rgb */ color: rgb(31, 79, 160);
/* oklch */ color: oklch(44.3% 0.142 260.3);

Tailwind

colors: {
  custom: {
    50: '#707fbd',
    500: '#1f4fa0',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fa0;
$custom-light: #707fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fa0",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 160
  },
  "hsl": {
    "h": 217.674,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.44305,
    "c": 0.14162,
    "h": 260.3
  },
  "luminance": 0.08421
}

Semantic roles & 50–950 ramp

primary

#1F4FA0

secondary

#C39B58

accent

#AA3DEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4FA0

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

Preview Lab → · Contrast checker → · Palette generator →