#1F529C#1F529C

#1F529C is a dark, vivid blue. Relative luminance 0.087; OKLCH L 44.7% C 0.132 H 258.2°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#1F529C
RGB	rgb(31, 82, 156)
HSL	hsl(216, 67%, 37%)
HSV	hsv(216, 80%, 61%)
CMYK	cmyk(80.1%, 47.4%, 0%, 38.8%)
CIE-LAB	lab(35.45, 10.93, -45.13)
CIE-LCH	lch(35.45, 46.43, 283.62°)
OKLab	oklab(44.68% -0.027 -0.1296)
OKLCH	oklch(44.68% 0.132 258.2)
XYZ	xyz(9.5809, 8.7251, 32.6252)
Luminance	0.0873 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F529C #9C691F

analogous

#1F919C #1F529C #2B1F9C

triadic

#1F529C #9C1F52 #529C1F

tetradic

#1F529C #9C1F91 #9C691F #1F9C2B

square

#1F529C #9C1F91 #9C691F #1F9C2B

split-complementary

#1F529C #9C2B1F #919C1F

monochromatic

#0B1C36 #153769 #1F529C #296DCF #588EDE

Accessibility & contrast

On white

7.65

#1F529C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#1F529C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F529C

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F529C	#FFFFFF	#000000	##FFFFFF
##1F529C	1.00	7.65	2.75	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A599F

Deuteranopia (green-blind)

#064E9B

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f529c;
/* rgb */ color: rgb(31, 82, 156);
/* oklch */ color: oklch(44.7% 0.132 258.2);

Tailwind

colors: {
  custom: {
    50: '#6f82ba',
    500: '#1f529c',
    950: '#000000',
  },
}

SCSS

$custom: #1f529c;
$custom-light: #6f82ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f529c",
  "rgb": {
    "r": 31,
    "g": 82,
    "b": 156
  },
  "hsl": {
    "h": 215.52,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.44683,
    "c": 0.13236,
    "h": 258.2
  },
  "luminance": 0.08726
}

Semantic roles & 50–950 ramp

primary

#1F529C

secondary

#C19555

accent

#A43EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F529C

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

Preview Lab → · Contrast checker → · Palette generator →