#1F57AD#1F57AD

#1F57AD is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.1% C 0.150 H 259.2°. Best body text is #FFFFFF at 6.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F57AD
RGB	rgb(31, 87, 173)
HSL	hsl(216, 70%, 40%)
HSV	hsv(216, 82%, 68%)
CMYK	cmyk(82.1%, 49.7%, 0%, 32.2%)
CIE-LAB	lab(38.06, 14.36, -51.06)
CIE-LCH	lch(38.06, 53.05, 285.71°)
OKLab	oklab(47.06% -0.0282 -0.1469)
OKLCH	oklch(47.06% 0.15 259.2)
XYZ	xyz(11.5133, 10.1234, 40.8743)
Luminance	0.1013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F57AD #AD751F

analogous

#1F9EAD #1F57AD #2E1FAD

triadic

#1F57AD #AD1F57 #57AD1F

tetradic

#1F57AD #AD1F9E #AD751F #1FAD2E

square

#1F57AD #AD1F9E #AD751F #1FAD2E

split-complementary

#1F57AD #AD2E1F #9EAD1F

monochromatic

#0C2345 #163D79 #1F57AD #2F73DA #6396E3

Accessibility & contrast

On white

6.94

#1F57AD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#1F57AD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F57AD

6.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F57AD	#FFFFFF	#000000	##FFFFFF
##1F57AD	1.00	6.94	3.03	6.94
#FFFFFF	6.94	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2360B0

Deuteranopia (green-blind)

#0054AB

Tritanopia (blue-blind)

#006C7A

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #1f57ad;
/* rgb */ color: rgb(31, 87, 173);
/* oklch */ color: oklch(47.1% 0.150 259.2);

Tailwind

colors: {
  custom: {
    50: '#7385c6',
    500: '#1f57ad',
    950: '#000000',
  },
}

SCSS

$custom: #1f57ad;
$custom-light: #7385c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f57ad",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 173
  },
  "hsl": {
    "h": 216.338,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.47062,
    "c": 0.14961,
    "h": 259.2
  },
  "luminance": 0.10125
}

Semantic roles & 50–950 ramp

primary

#1F57AD

secondary

#C89F60

accent

#A73BEC

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090B13

muted

#7B7C82

Preview Lab

Preview with #1F57AD

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

Preview Lab → · Contrast checker → · Palette generator →