#1F53A4#1F53A4

#1F53A4 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.5% C 0.142 H 259.3°. Best body text is #FFFFFF at 7.42:1 contrast (WCAG AA passes).

Color values

HEX	#1F53A4
RGB	rgb(31, 83, 164)
HSL	hsl(217, 68%, 38%)
HSV	hsv(217, 81%, 64%)
CMYK	cmyk(81.1%, 49.4%, 0%, 35.7%)
CIE-LAB	lab(36.28, 13.45, -48.58)
CIE-LCH	lch(36.28, 50.41, 285.48°)
OKLab	oklab(45.5% -0.0264 -0.1397)
OKLCH	oklch(45.5% 0.142 259.3)
XYZ	xyz(10.3567, 9.1569, 36.3364)
Luminance	0.0916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F53A4 #A4701F

analogous

#1F95A4 #1F53A4 #2D1FA4

triadic

#1F53A4 #A41F53 #53A41F

tetradic

#1F53A4 #A41F95 #A4701F #1FA42D

square

#1F53A4 #A41F95 #A4701F #1FA42D

split-complementary

#1F53A4 #A42D1F #95A41F

monochromatic

#0C1F3D #153971 #1F53A4 #2A6DD7 #5D90E0

Accessibility & contrast

On white

7.42

#1F53A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#1F53A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F53A4

7.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F53A4	#FFFFFF	#000000	##FFFFFF
##1F53A4	1.00	7.42	2.83	7.42
#FFFFFF	7.42	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#235CA7

Deuteranopia (green-blind)

#0050A2

Tritanopia (blue-blind)

#006673

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f53a4;
/* rgb */ color: rgb(31, 83, 164);
/* oklch */ color: oklch(45.5% 0.142 259.3);

Tailwind

colors: {
  custom: {
    50: '#7182bf',
    500: '#1f53a4',
    950: '#000000',
  },
}

SCSS

$custom: #1f53a4;
$custom-light: #7182bf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f53a4",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 164
  },
  "hsl": {
    "h": 216.541,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.45499,
    "c": 0.1422,
    "h": 259.3
  },
  "luminance": 0.09158
}

Semantic roles & 50–950 ramp

primary

#1F53A4

secondary

#C59B5A

accent

#A73DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F53A4

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

Preview Lab → · Contrast checker → · Palette generator →