#1F4BB4#1F4BB4

#1F4BB4 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.1% C 0.174 H 263.6°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F4BB4
RGB	rgb(31, 75, 180)
HSL	hsl(222, 71%, 41%)
HSV	hsv(222, 83%, 71%)
CMYK	cmyk(82.8%, 58.3%, 0%, 29.4%)
CIE-LAB	lab(35.24, 25.13, -59.79)
CIE-LCH	lch(35.24, 64.86, 292.80°)
OKLab	oklab(45.08% -0.0192 -0.1728)
OKLCH	oklch(45.08% 0.174 263.6)
XYZ	xyz(11.3164, 8.6174, 44.2381)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4BB4 #B4881F

analogous

#1F96B4 #1F4BB4 #3E1FB4

triadic

#1F4BB4 #B41F4B #4BB41F

tetradic

#1F4BB4 #B41F96 #B4881F #1FB43E

square

#1F4BB4 #B41F96 #B4881F #1FB43E

split-complementary

#1F4BB4 #B43E1F #96B41F

monochromatic

#0D1F4C #163580 #1F4BB4 #3466DC #688DE5

Accessibility & contrast

On white

7.71

#1F4BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1F4BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4BB4

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4BB4	#FFFFFF	#000000	##FFFFFF
##1F4BB4	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB8

Deuteranopia (green-blind)

#004CB2

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4bb4;
/* rgb */ color: rgb(31, 75, 180);
/* oklch */ color: oklch(45.1% 0.174 263.6);

Tailwind

colors: {
  custom: {
    50: '#757ccb',
    500: '#1f4bb4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4bb4;
$custom-light: #757ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4bb4",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 180
  },
  "hsl": {
    "h": 222.282,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.45081,
    "c": 0.17391,
    "h": 263.6
  },
  "luminance": 0.08619
}

Semantic roles & 50–950 ramp

primary

#1F4BB4

secondary

#CBAC64

accent

#B93AED

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4BB4

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

Preview Lab → · Contrast checker → · Palette generator →