#1F4B9E#1F4B9E

#1F4B9E is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.3% C 0.144 H 261.6°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B9E
RGB	rgb(31, 75, 158)
HSL	hsl(219, 67%, 37%)
HSV	hsv(219, 80%, 62%)
CMYK	cmyk(80.4%, 52.5%, 0%, 38%)
CIE-LAB	lab(33.54, 16.44, -49.41)
CIE-LCH	lch(33.54, 52.07, 288.41°)
OKLab	oklab(43.27% -0.0211 -0.1423)
OKLCH	oklch(43.27% 0.144 261.6)
XYZ	xyz(9.2505, 7.7910, 33.3574)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B9E #9E721F

analogous

#1F8A9E #1F4B9E #331F9E

triadic

#1F4B9E #9E1F4B #4B9E1F

tetradic

#1F4B9E #9E1F8A #9E721F #1F9E33

square

#1F4B9E #9E1F8A #9E721F #1F9E33

split-complementary

#1F4B9E #9E331F #8A9E1F

monochromatic

#0B1A38 #15336B #1F4B9E #2963D1 #5987DE

Accessibility & contrast

On white

8.21

#1F4B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#1F4B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B9E

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B9E	#FFFFFF	#000000	##FFFFFF
##1F4B9E	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1255A1

Deuteranopia (green-blind)

#00499C

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4b9e;
/* rgb */ color: rgb(31, 75, 158);
/* oklch */ color: oklch(43.3% 0.144 261.6);

Tailwind

colors: {
  custom: {
    50: '#707cbb',
    500: '#1f4b9e',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b9e;
$custom-light: #707cbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b9e",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 158
  },
  "hsl": {
    "h": 219.213,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.43267,
    "c": 0.14387,
    "h": 261.6
  },
  "luminance": 0.07792
}

Semantic roles & 50–950 ramp

primary

#1F4B9E

secondary

#C29D56

accent

#AE3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4B9E

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

Preview Lab → · Contrast checker → · Palette generator →