#1F4FA8#1F4FA8

#1F4FA8 is a dark, vivid blue. Relative luminance 0.087; OKLCH L 44.9% C 0.153 H 261.4°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FA8
RGB	rgb(31, 79, 168)
HSL	hsl(219, 69%, 39%)
HSV	hsv(219, 82%, 66%)
CMYK	cmyk(81.5%, 53%, 0%, 34.1%)
CIE-LAB	lab(35.42, 17.72, -52.37)
CIE-LCH	lch(35.42, 55.29, 288.69°)
OKLab	oklab(44.93% -0.0229 -0.1509)
OKLCH	oklch(44.93% 0.153 261.4)
XYZ	xyz(10.4264, 8.7092, 38.1697)
Luminance	0.0871 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FA8 #A8781F

analogous

#1F94A8 #1F4FA8 #341FA8

triadic

#1F4FA8 #A81F4F #4FA81F

tetradic

#1F4FA8 #A81F94 #A8781F #1FA834

square

#1F4FA8 #A81F94 #A8781F #1FA834

split-complementary

#1F4FA8 #A8341F #94A81F

monochromatic

#0C1E41 #153774 #1F4FA8 #2C68D8 #608DE2

Accessibility & contrast

On white

7.66

#1F4FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1F4FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FA8

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FA8	#FFFFFF	#000000	##FFFFFF
##1F4FA8	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D5AAB

Deuteranopia (green-blind)

#004DA6

Tritanopia (blue-blind)

#006574

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4fa8;
/* rgb */ color: rgb(31, 79, 168);
/* oklch */ color: oklch(44.9% 0.153 261.4);

Tailwind

colors: {
  custom: {
    50: '#727fc2',
    500: '#1f4fa8',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fa8;
$custom-light: #727fc2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fa8",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 168
  },
  "hsl": {
    "h": 218.978,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44927,
    "c": 0.15268,
    "h": 261.4
  },
  "luminance": 0.0871
}

Semantic roles & 50–950 ramp

primary

#1F4FA8

secondary

#C6A15D

accent

#AE3CEC

background

#F7F7FC

surface

#EDEEF8

border

#C8C9D1

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4FA8

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

Preview Lab → · Contrast checker → · Palette generator →