#1F4E9F#1F4E9F

#1F4E9F is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.0% C 0.141 H 260.5°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#1F4E9F
RGB	rgb(31, 78, 159)
HSL	hsl(218, 67%, 37%)
HSV	hsv(218, 81%, 62%)
CMYK	cmyk(80.5%, 50.9%, 0%, 37.6%)
CIE-LAB	lab(34.48, 14.81, -48.49)
CIE-LCH	lch(34.48, 50.70, 286.99°)
OKLab	oklab(44.01% -0.0233 -0.1396)
OKLCH	oklch(44.01% 0.141 260.5)
XYZ	xyz(9.5452, 8.2422, 33.8820)
Luminance	0.0824 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4E9F #9F701F

analogous

#1F8E9F #1F4E9F #301F9F

triadic

#1F4E9F #9F1F4E #4E9F1F

tetradic

#1F4E9F #9F1F8E #9F701F #1F9F30

square

#1F4E9F #9F1F8E #9F701F #1F9F30

split-complementary

#1F4E9F #9F301F #8E9F1F

monochromatic

#0B1C39 #15356C #1F4E9F #2967D2 #5A8BDF

Accessibility & contrast

On white

7.93

#1F4E9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1F4E9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4E9F

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4E9F	#FFFFFF	#000000	##FFFFFF
##1F4E9F	1.00	7.93	2.65	7.93
#FFFFFF	7.93	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B57A2

Deuteranopia (green-blind)

#004C9D

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f4e9f;
/* rgb */ color: rgb(31, 78, 159);
/* oklch */ color: oklch(44.0% 0.141 260.5);

Tailwind

colors: {
  custom: {
    50: '#707ebc',
    500: '#1f4e9f',
    950: '#000000',
  },
}

SCSS

$custom: #1f4e9f;
$custom-light: #707ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4e9f",
  "rgb": {
    "r": 31,
    "g": 78,
    "b": 159
  },
  "hsl": {
    "h": 217.969,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.44006,
    "c": 0.14149,
    "h": 260.5
  },
  "luminance": 0.08243
}

Semantic roles & 50–950 ramp

primary

#1F4E9F

secondary

#C39B57

accent

#AB3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4E9F

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

Preview Lab → · Contrast checker → · Palette generator →