#1F4EB4#1F4EB4

#1F4EB4 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.7% C 0.170 H 262.9°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F4EB4
RGB	rgb(31, 78, 180)
HSL	hsl(221, 71%, 41%)
HSV	hsv(221, 83%, 71%)
CMYK	cmyk(82.8%, 56.7%, 0%, 29.4%)
CIE-LAB	lab(36.05, 23.12, -58.47)
CIE-LCH	lch(36.05, 62.87, 291.58°)
OKLab	oklab(45.69% -0.0211 -0.1689)
OKLCH	oklch(45.69% 0.17 262.9)
XYZ	xyz(11.5247, 9.0340, 44.3075)
Luminance	0.0903 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4EB4 #B4851F

analogous

#1F99B4 #1F4EB4 #3B1FB4

triadic

#1F4EB4 #B41F4E #4EB41F

tetradic

#1F4EB4 #B41F99 #B4851F #1FB43B

square

#1F4EB4 #B41F99 #B4851F #1FB43B

split-complementary

#1F4EB4 #B43B1F #99B41F

monochromatic

#0D214C #163780 #1F4EB4 #3469DC #6890E5

Accessibility & contrast

On white

7.48

#1F4EB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1F4EB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4EB4

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4EB4	#FFFFFF	#000000	##FFFFFF
##1F4EB4	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB8

Deuteranopia (green-blind)

#004EB2

Tritanopia (blue-blind)

#006879

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f4eb4;
/* rgb */ color: rgb(31, 78, 180);
/* oklch */ color: oklch(45.7% 0.170 262.9);

Tailwind

colors: {
  custom: {
    50: '#757ecb',
    500: '#1f4eb4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4eb4;
$custom-light: #757ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4eb4",
  "rgb": {
    "r": 31,
    "g": 78,
    "b": 180
  },
  "hsl": {
    "h": 221.074,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.45692,
    "c": 0.17021,
    "h": 262.9
  },
  "luminance": 0.09035
}

Semantic roles & 50–950 ramp

primary

#1F4EB4

secondary

#CBAA64

accent

#B53AED

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1F4EB4

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

Preview Lab → · Contrast checker → · Palette generator →