#1F57A8#1F57A8

#1F57A8 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 46.7% C 0.143 H 258.3°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#1F57A8
RGB	rgb(31, 87, 168)
HSL	hsl(215, 69%, 39%)
HSV	hsv(215, 82%, 66%)
CMYK	cmyk(81.5%, 48.2%, 0%, 34.1%)
CIE-LAB	lab(37.72, 12.38, -48.65)
CIE-LCH	lch(37.72, 50.20, 284.28°)
OKLab	oklab(46.69% -0.0289 -0.1398)
OKLCH	oklch(46.69% 0.143 258.3)
XYZ	xyz(11.0386, 9.9335, 38.3738)
Luminance	0.0993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F57A8 #A8701F

analogous

#1F9CA8 #1F57A8 #2B1FA8

triadic

#1F57A8 #A81F57 #57A81F

tetradic

#1F57A8 #A81F9C #A8701F #1FA82B

square

#1F57A8 #A81F9C #A8701F #1FA82B

split-complementary

#1F57A8 #A82B1F #9CA81F

monochromatic

#0C2141 #153C74 #1F57A8 #2C72D8 #6095E2

Accessibility & contrast

On white

7.03

#1F57A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#1F57A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F57A8

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F57A8	#FFFFFF	#000000	##FFFFFF
##1F57A8	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)

#295FAB

Deuteranopia (green-blind)

#0053A6

Tritanopia (blue-blind)

#006A77

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1f57a8;
/* rgb */ color: rgb(31, 87, 168);
/* oklch */ color: oklch(46.7% 0.143 258.3);

Tailwind

colors: {
  custom: {
    50: '#7285c2',
    500: '#1f57a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f57a8;
$custom-light: #7285c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f57a8",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 168
  },
  "hsl": {
    "h": 215.474,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.46691,
    "c": 0.1428,
    "h": 258.3
  },
  "luminance": 0.09935
}

Semantic roles & 50–950 ramp

primary

#1F57A8

secondary

#C69B5D

accent

#A43CEC

background

#F7F8FC

surface

#EDEFF8

border

#C8CAD1

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #1F57A8

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

Preview Lab → · Contrast checker → · Palette generator →