#1F4FAC#1F4FAC

#1F4FAC is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.2% C 0.158 H 261.8°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FAC
RGB	rgb(31, 79, 172)
HSL	hsl(220, 69%, 40%)
HSV	hsv(220, 82%, 67%)
CMYK	cmyk(82%, 54.1%, 0%, 32.5%)
CIE-LAB	lab(35.71, 19.31, -54.27)
CIE-LCH	lch(35.71, 57.60, 289.58°)
OKLab	oklab(45.25% -0.0225 -0.1565)
OKLCH	oklch(45.25% 0.158 261.8)
XYZ	xyz(10.8048, 8.8605, 40.1625)
Luminance	0.0886 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FAC #AC7C1F

analogous

#1F96AC #1F4FAC #351FAC

triadic

#1F4FAC #AC1F4F #4FAC1F

tetradic

#1F4FAC #AC1F96 #AC7C1F #1FAC35

square

#1F4FAC #AC1F96 #AC7C1F #1FAC35

split-complementary

#1F4FAC #AC351F #96AC1F

monochromatic

#0C1F44 #163778 #1F4FAC #2F69D9 #638EE3

Accessibility & contrast

On white

7.57

#1F4FAC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#1F4FAC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FAC

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FAC	#FFFFFF	#000000	##FFFFFF
##1F4FAC	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BAF

Deuteranopia (green-blind)

#004EAA

Tritanopia (blue-blind)

#006675

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f4fac;
/* rgb */ color: rgb(31, 79, 172);
/* oklch */ color: oklch(45.2% 0.158 261.8);

Tailwind

colors: {
  custom: {
    50: '#737fc5',
    500: '#1f4fac',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fac;
$custom-light: #737fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fac",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 172
  },
  "hsl": {
    "h": 219.574,
    "s": 69.458,
    "l": 39.804
  },
  "oklch": {
    "l": 0.45246,
    "c": 0.15814,
    "h": 261.8
  },
  "luminance": 0.08862
}

Semantic roles & 50–950 ramp

primary

#1F4FAC

secondary

#C8A45F

accent

#B03CEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1F4FAC

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

Preview Lab → · Contrast checker → · Palette generator →