#1F54B4#1F54B4

#1F54B4 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 46.9% C 0.163 H 261.1°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#1F54B4
RGB	rgb(31, 84, 180)
HSL	hsl(219, 71%, 41%)
HSV	hsv(219, 83%, 71%)
CMYK	cmyk(82.8%, 53.3%, 0%, 29.4%)
CIE-LAB	lab(37.71, 19.12, -55.77)
CIE-LCH	lch(37.71, 58.96, 288.93°)
OKLab	oklab(46.95% -0.0251 -0.1609)
OKLCH	oklch(46.95% 0.163 261.1)
XYZ	xyz(11.9706, 9.9258, 44.4561)
Luminance	0.0993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F54B4 #B47F1F

analogous

#1F9FB4 #1F54B4 #351FB4

triadic

#1F54B4 #B41F54 #54B41F

tetradic

#1F54B4 #B41F9F #B47F1F #1FB435

square

#1F54B4 #B41F9F #B47F1F #1FB435

split-complementary

#1F54B4 #B4351F #9FB41F

monochromatic

#0D234C #163C80 #1F54B4 #3470DC #6895E5

Accessibility & contrast

On white

7.03

#1F54B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#1F54B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F54B4

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F54B4	#FFFFFF	#000000	##FFFFFF
##1F54B4	1.00	7.03	2.99	7.03
#FFFFFF	7.03	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0660B7

Deuteranopia (green-blind)

#0052B2

Tritanopia (blue-blind)

#006C7C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1f54b4;
/* rgb */ color: rgb(31, 84, 180);
/* oklch */ color: oklch(46.9% 0.163 261.1);

Tailwind

colors: {
  custom: {
    50: '#7583cb',
    500: '#1f54b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f54b4;
$custom-light: #7583cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f54b4",
  "rgb": {
    "r": 31,
    "g": 84,
    "b": 180
  },
  "hsl": {
    "h": 218.658,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.46949,
    "c": 0.1628,
    "h": 261.1
  },
  "luminance": 0.09927
}

Semantic roles & 50–950 ramp

primary

#1F54B4

secondary

#CBA664

accent

#AE3AED

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1F54B4

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

Preview Lab → · Contrast checker → · Palette generator →