#1F529F#1F529F

#1F529F is a dark, vivid blue. Relative luminance 0.088; OKLCH L 44.9% C 0.137 H 258.8°. Best body text is #FFFFFF at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#1F529F
RGB	rgb(31, 82, 159)
HSL	hsl(216, 67%, 37%)
HSV	hsv(216, 81%, 62%)
CMYK	cmyk(80.5%, 48.4%, 0%, 37.6%)
CIE-LAB	lab(35.65, 12.13, -46.61)
CIE-LCH	lch(35.65, 48.16, 284.59°)
OKLab	oklab(44.9% -0.0265 -0.1339)
OKLCH	oklch(44.9% 0.137 258.8)
XYZ	xyz(9.8381, 8.8279, 33.9796)
Luminance	0.0883 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F529F #9F6C1F

analogous

#1F929F #1F529F #2C1F9F

triadic

#1F529F #9F1F52 #529F1F

tetradic

#1F529F #9F1F92 #9F6C1F #1F9F2C

square

#1F529F #9F1F92 #9F6C1F #1F9F2C

split-complementary

#1F529F #9F2C1F #929F1F

monochromatic

#0B1D39 #15386C #1F529F #296CD2 #5A8FDF

Accessibility & contrast

On white

7.59

#1F529F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#1F529F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F529F

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F529F	#FFFFFF	#000000	##FFFFFF
##1F529F	1.00	7.59	2.77	7.59
#FFFFFF	7.59	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275AA2

Deuteranopia (green-blind)

#004E9D

Tritanopia (blue-blind)

#006471

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f529f;
/* rgb */ color: rgb(31, 82, 159);
/* oklch */ color: oklch(44.9% 0.137 258.8);

Tailwind

colors: {
  custom: {
    50: '#7082bc',
    500: '#1f529f',
    950: '#000000',
  },
}

SCSS

$custom: #1f529f;
$custom-light: #7082bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f529f",
  "rgb": {
    "r": 31,
    "g": 82,
    "b": 159
  },
  "hsl": {
    "h": 216.094,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.44903,
    "c": 0.13652,
    "h": 258.8
  },
  "luminance": 0.08829
}

Semantic roles & 50–950 ramp

primary

#1F529F

secondary

#C39857

accent

#A53EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F529F

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

Preview Lab → · Contrast checker → · Palette generator →