#1F4C9F#1F4C9F

#1F4C9F is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.6% C 0.144 H 261.3°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#1F4C9F
RGB	rgb(31, 76, 159)
HSL	hsl(219, 67%, 37%)
HSV	hsv(219, 81%, 62%)
CMYK	cmyk(80.5%, 52.2%, 0%, 37.6%)
CIE-LAB	lab(33.90, 16.16, -49.43)
CIE-LCH	lch(33.90, 52.00, 288.11°)
OKLab	oklab(43.57% -0.0217 -0.1423)
OKLCH	oklch(43.57% 0.144 261.3)
XYZ	xyz(9.4053, 7.9623, 33.8353)
Luminance	0.0796 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4C9F #9F721F

analogous

#1F8C9F #1F4C9F #321F9F

triadic

#1F4C9F #9F1F4C #4C9F1F

tetradic

#1F4C9F #9F1F8C #9F721F #1F9F32

square

#1F4C9F #9F1F8C #9F721F #1F9F32

split-complementary

#1F4C9F #9F321F #8C9F1F

monochromatic

#0B1B39 #15346C #1F4C9F #2964D2 #5A88DF

Accessibility & contrast

On white

8.10

#1F4C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1F4C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4C9F

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4C9F	#FFFFFF	#000000	##FFFFFF
##1F4C9F	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1456A2

Deuteranopia (green-blind)

#004A9D

Tritanopia (blue-blind)

#00606E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4c9f;
/* rgb */ color: rgb(31, 76, 159);
/* oklch */ color: oklch(43.6% 0.144 261.3);

Tailwind

colors: {
  custom: {
    50: '#707dbc',
    500: '#1f4c9f',
    950: '#000000',
  },
}

SCSS

$custom: #1f4c9f;
$custom-light: #707dbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4c9f",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 159
  },
  "hsl": {
    "h": 218.906,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.43565,
    "c": 0.144,
    "h": 261.3
  },
  "luminance": 0.07963
}

Semantic roles & 50–950 ramp

primary

#1F4C9F

secondary

#C39D57

accent

#AE3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4C9F

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

Preview Lab → · Contrast checker → · Palette generator →