#1F509F#1F509F

#1F509F is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.5% C 0.139 H 259.7°. Best body text is #FFFFFF at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F509F
RGB	rgb(31, 80, 159)
HSL	hsl(217, 67%, 37%)
HSV	hsv(217, 81%, 62%)
CMYK	cmyk(80.5%, 49.7%, 0%, 37.6%)
CIE-LAB	lab(35.06, 13.47, -47.55)
CIE-LCH	lch(35.06, 49.42, 285.81°)
OKLab	oklab(44.45% -0.0249 -0.1367)
OKLCH	oklch(44.45% 0.139 259.7)
XYZ	xyz(9.6895, 8.5307, 33.9301)
Luminance	0.0853 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F509F #9F6E1F

analogous

#1F909F #1F509F #2E1F9F

triadic

#1F509F #9F1F50 #509F1F

tetradic

#1F509F #9F1F90 #9F6E1F #1F9F2E

square

#1F509F #9F1F90 #9F6E1F #1F9F2E

split-complementary

#1F509F #9F2E1F #909F1F

monochromatic

#0B1C39 #15366C #1F509F #296AD2 #5A8DDF

Accessibility & contrast

On white

7.76

#1F509F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1F509F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F509F

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F509F	#FFFFFF	#000000	##FFFFFF
##1F509F	1.00	7.76	2.71	7.76
#FFFFFF	7.76	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2159A2

Deuteranopia (green-blind)

#004D9D

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f509f;
/* rgb */ color: rgb(31, 80, 159);
/* oklch */ color: oklch(44.5% 0.139 259.7);

Tailwind

colors: {
  custom: {
    50: '#7080bc',
    500: '#1f509f',
    950: '#000000',
  },
}

SCSS

$custom: #1f509f;
$custom-light: #7080bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f509f",
  "rgb": {
    "r": 31,
    "g": 80,
    "b": 159
  },
  "hsl": {
    "h": 217.031,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.44452,
    "c": 0.13899,
    "h": 259.7
  },
  "luminance": 0.08532
}

Semantic roles & 50–950 ramp

primary

#1F509F

secondary

#C39A57

accent

#A83EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F509F

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

Preview Lab → · Contrast checker → · Palette generator →