#1F4FB4#1F4FB4

#1F4FB4 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.9% C 0.169 H 262.6°. Best body text is #FFFFFF at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FB4
RGB	rgb(31, 79, 180)
HSL	hsl(221, 71%, 41%)
HSV	hsv(221, 83%, 71%)
CMYK	cmyk(82.8%, 56.1%, 0%, 29.4%)
CIE-LAB	lab(36.32, 22.46, -58.02)
CIE-LCH	lch(36.32, 62.22, 291.16°)
OKLab	oklab(45.9% -0.0217 -0.1676)
OKLCH	oklch(45.9% 0.169 262.6)
XYZ	xyz(11.5963, 9.1771, 44.3313)
Luminance	0.0918 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FB4 #B4841F

analogous

#1F9AB4 #1F4FB4 #3A1FB4

triadic

#1F4FB4 #B41F4F #4FB41F

tetradic

#1F4FB4 #B41F9A #B4841F #1FB43A

square

#1F4FB4 #B41F9A #B4841F #1FB43A

split-complementary

#1F4FB4 #B43A1F #9AB41F

monochromatic

#0D214C #163880 #1F4FB4 #346ADC #6891E5

Accessibility & contrast

On white

7.41

#1F4FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#1F4FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FB4

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FB4	#FFFFFF	#000000	##FFFFFF
##1F4FB4	1.00	7.41	2.84	7.41
#FFFFFF	7.41	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB7

Deuteranopia (green-blind)

#004FB2

Tritanopia (blue-blind)

#006879

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f4fb4;
/* rgb */ color: rgb(31, 79, 180);
/* oklch */ color: oklch(45.9% 0.169 262.6);

Tailwind

colors: {
  custom: {
    50: '#757fcb',
    500: '#1f4fb4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fb4;
$custom-light: #757fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fb4",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 180
  },
  "hsl": {
    "h": 220.671,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.45899,
    "c": 0.16898,
    "h": 262.6
  },
  "luminance": 0.09179
}

Semantic roles & 50–950 ramp

primary

#1F4FB4

secondary

#CBAA64

accent

#B43AED

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1F4FB4

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

Preview Lab → · Contrast checker → · Palette generator →