#1F57A9#1F57A9

#1F57A9 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 46.8% C 0.144 H 258.5°. Best body text is #FFFFFF at 7.01:1 contrast (WCAG AA passes).

Color values

HEX	#1F57A9
RGB	rgb(31, 87, 169)
HSL	hsl(216, 69%, 39%)
HSV	hsv(216, 82%, 66%)
CMYK	cmyk(81.7%, 48.5%, 0%, 33.7%)
CIE-LAB	lab(37.79, 12.78, -49.13)
CIE-LCH	lch(37.79, 50.77, 284.58°)
OKLab	oklab(46.77% -0.0288 -0.1413)
OKLCH	oklch(46.77% 0.144 258.5)
XYZ	xyz(11.1321, 9.9709, 38.8663)
Luminance	0.0997 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F57A9 #A9711F

analogous

#1F9CA9 #1F57A9 #2C1FA9

triadic

#1F57A9 #A91F57 #57A91F

tetradic

#1F57A9 #A91F9C #A9711F #1FA92C

square

#1F57A9 #A91F9C #A9711F #1FA92C

split-complementary

#1F57A9 #A92C1F #9CA91F

monochromatic

#0C2242 #163C75 #1F57A9 #2D72D8 #6095E2

Accessibility & contrast

On white

7.01

#1F57A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#1F57A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F57A9

7.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F57A9	#FFFFFF	#000000	##FFFFFF
##1F57A9	1.00	7.01	2.99	7.01
#FFFFFF	7.01	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2860AC

Deuteranopia (green-blind)

#0053A7

Tritanopia (blue-blind)

#006B78

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1f57a9;
/* rgb */ color: rgb(31, 87, 169);
/* oklch */ color: oklch(46.8% 0.144 258.5);

Tailwind

colors: {
  custom: {
    50: '#7285c3',
    500: '#1f57a9',
    950: '#000000',
  },
}

SCSS

$custom: #1f57a9;
$custom-light: #7285c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f57a9",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 169
  },
  "hsl": {
    "h": 215.652,
    "s": 69,
    "l": 39.216
  },
  "oklch": {
    "l": 0.46765,
    "c": 0.14416,
    "h": 258.5
  },
  "luminance": 0.09972
}

Semantic roles & 50–950 ramp

primary

#1F57A9

secondary

#C79C5D

accent

#A43CEC

background

#F7F8FC

surface

#EDEFF8

border

#C8CAD1

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #1F57A9

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

Preview Lab → · Contrast checker → · Palette generator →