#1F529B#1F529B

#1F529B is a dark, vivid blue. Relative luminance 0.087; OKLCH L 44.6% C 0.131 H 258.0°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F529B
RGB	rgb(31, 82, 155)
HSL	hsl(215, 67%, 36%)
HSV	hsv(215, 80%, 61%)
CMYK	cmyk(80%, 47.1%, 0%, 39.2%)
CIE-LAB	lab(35.38, 10.54, -44.63)
CIE-LCH	lch(35.38, 45.86, 283.28°)
OKLab	oklab(44.61% -0.0272 -0.1281)
OKLCH	oklch(44.61% 0.131 258)
XYZ	xyz(9.4966, 8.6913, 32.1811)
Luminance	0.0869 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F529B #9B681F

analogous

#1F909B #1F529B #2A1F9B

triadic

#1F529B #9B1F52 #529B1F

tetradic

#1F529B #9B1F90 #9B681F #1F9B2A

square

#1F529B #9B1F90 #9B681F #1F9B2A

split-complementary

#1F529B #9B2A1F #909B1F

monochromatic

#0B1C35 #153768 #1F529B #296DCE #578EDD

Accessibility & contrast

On white

7.67

#1F529B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1F529B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F529B

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F529B	#FFFFFF	#000000	##FFFFFF
##1F529B	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B599E

Deuteranopia (green-blind)

#0A4E9A

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f529b;
/* rgb */ color: rgb(31, 82, 155);
/* oklch */ color: oklch(44.6% 0.131 258.0);

Tailwind

colors: {
  custom: {
    50: '#6f82b9',
    500: '#1f529b',
    950: '#000000',
  },
}

SCSS

$custom: #1f529b;
$custom-light: #6f82b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f529b",
  "rgb": {
    "r": 31,
    "g": 82,
    "b": 155
  },
  "hsl": {
    "h": 215.323,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.44611,
    "c": 0.13097,
    "h": 258
  },
  "luminance": 0.08692
}

Semantic roles & 50–950 ramp

primary

#1F529B

secondary

#C19555

accent

#A33EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F529B

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

Preview Lab → · Contrast checker → · Palette generator →