#1F509D#1F509D

#1F509D is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.3% C 0.136 H 259.4°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#1F509D
RGB	rgb(31, 80, 157)
HSL	hsl(217, 67%, 37%)
HSV	hsv(217, 80%, 62%)
CMYK	cmyk(80.3%, 49%, 0%, 38.4%)
CIE-LAB	lab(34.93, 12.67, -46.57)
CIE-LCH	lch(34.93, 48.26, 285.22°)
OKLab	oklab(44.3% -0.0252 -0.1339)
OKLCH	oklch(44.3% 0.136 259.4)
XYZ	xyz(9.5173, 8.4618, 33.0234)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F509D #9D6C1F

analogous

#1F8F9D #1F509D #2D1F9D

triadic

#1F509D #9D1F50 #509D1F

tetradic

#1F509D #9D1F8F #9D6C1F #1F9D2D

square

#1F509D #9D1F8F #9D6C1F #1F9D2D

split-complementary

#1F509D #9D2D1F #8F9D1F

monochromatic

#0B1C37 #15366A #1F509D #296AD0 #588CDE

Accessibility & contrast

On white

7.80

#1F509D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1F509D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F509D

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F509D	#FFFFFF	#000000	##FFFFFF
##1F509D	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2458A0

Deuteranopia (green-blind)

#004D9B

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f509d;
/* rgb */ color: rgb(31, 80, 157);
/* oklch */ color: oklch(44.3% 0.136 259.4);

Tailwind

colors: {
  custom: {
    50: '#6f80ba',
    500: '#1f509d',
    950: '#000000',
  },
}

SCSS

$custom: #1f509d;
$custom-light: #6f80ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f509d",
  "rgb": {
    "r": 31,
    "g": 80,
    "b": 157
  },
  "hsl": {
    "h": 216.667,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.44303,
    "c": 0.13621,
    "h": 259.4
  },
  "luminance": 0.08463
}

Semantic roles & 50–950 ramp

primary

#1F509D

secondary

#C29856

accent

#A73EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F509D

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

Preview Lab → · Contrast checker → · Palette generator →