#1F57AC#1F57AC

#1F57AC is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.0% C 0.148 H 259.0°. Best body text is #FFFFFF at 6.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F57AC
RGB	rgb(31, 87, 172)
HSL	hsl(216, 69%, 40%)
HSV	hsv(216, 82%, 67%)
CMYK	cmyk(82%, 49.4%, 0%, 32.5%)
CIE-LAB	lab(37.99, 13.97, -50.58)
CIE-LCH	lch(37.99, 52.48, 285.44°)
OKLab	oklab(46.99% -0.0283 -0.1455)
OKLCH	oklch(46.99% 0.148 259)
XYZ	xyz(11.4169, 10.0849, 40.3666)
Luminance	0.1009 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F57AC #AC741F

analogous

#1F9EAC #1F57AC #2D1FAC

triadic

#1F57AC #AC1F57 #57AC1F

tetradic

#1F57AC #AC1F9E #AC741F #1FAC2D

square

#1F57AC #AC1F9E #AC741F #1FAC2D

split-complementary

#1F57AC #AC2D1F #9EAC1F

monochromatic

#0C2344 #163D78 #1F57AC #2F73D9 #6396E3

Accessibility & contrast

On white

6.96

#1F57AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#1F57AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F57AC

6.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F57AC	#FFFFFF	#000000	##FFFFFF
##1F57AC	1.00	6.96	3.02	6.96
#FFFFFF	6.96	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2460AF

Deuteranopia (green-blind)

#0053AA

Tritanopia (blue-blind)

#006C79

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1f57ac;
/* rgb */ color: rgb(31, 87, 172);
/* oklch */ color: oklch(47.0% 0.148 259.0);

Tailwind

colors: {
  custom: {
    50: '#7385c5',
    500: '#1f57ac',
    950: '#000000',
  },
}

SCSS

$custom: #1f57ac;
$custom-light: #7385c5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f57ac",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 172
  },
  "hsl": {
    "h": 216.17,
    "s": 69.458,
    "l": 39.804
  },
  "oklch": {
    "l": 0.46987,
    "c": 0.14826,
    "h": 259
  },
  "luminance": 0.10086
}

Semantic roles & 50–950 ramp

primary

#1F57AC

secondary

#C89E5F

accent

#A63CEC

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090B13

muted

#7B7C82

Preview Lab

Preview with #1F57AC

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

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