#1F4FA1#1F4FA1

#1F4FA1 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.4% C 0.143 H 260.4°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FA1
RGB	rgb(31, 79, 161)
HSL	hsl(218, 68%, 38%)
HSV	hsv(218, 81%, 63%)
CMYK	cmyk(80.7%, 50.9%, 0%, 36.9%)
CIE-LAB	lab(34.91, 14.94, -49.00)
CIE-LCH	lch(34.91, 51.22, 286.95°)
OKLab	oklab(44.38% -0.0238 -0.141)
OKLCH	oklch(44.38% 0.143 260.4)
XYZ	xyz(9.7917, 8.4553, 34.8273)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FA1 #A1711F

analogous

#1F90A1 #1F4FA1 #301FA1

triadic

#1F4FA1 #A11F4F #4FA11F

tetradic

#1F4FA1 #A11F90 #A1711F #1FA130

square

#1F4FA1 #A11F90 #A1711F #1FA130

split-complementary

#1F4FA1 #A1301F #90A11F

monochromatic

#0B1D3A #15366E #1F4FA1 #2968D4 #5B8CDF

Accessibility & contrast

On white

7.80

#1F4FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1F4FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FA1

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FA1	#FFFFFF	#000000	##FFFFFF
##1F4FA1	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C58A4

Deuteranopia (green-blind)

#004D9F

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4fa1;
/* rgb */ color: rgb(31, 79, 161);
/* oklch */ color: oklch(44.4% 0.143 260.4);

Tailwind

colors: {
  custom: {
    50: '#707fbd',
    500: '#1f4fa1',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fa1;
$custom-light: #707fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fa1",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 161
  },
  "hsl": {
    "h": 217.846,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.44382,
    "c": 0.14301,
    "h": 260.4
  },
  "luminance": 0.08456
}

Semantic roles & 50–950 ramp

primary

#1F4FA1

secondary

#C49C58

accent

#AB3DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4FA1

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

Preview Lab → · Contrast checker → · Palette generator →