#1F4BA0#1F4BA0

#1F4BA0 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.4% C 0.147 H 261.8°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#1F4BA0
RGB	rgb(31, 75, 160)
HSL	hsl(220, 68%, 37%)
HSV	hsv(220, 81%, 63%)
CMYK	cmyk(80.6%, 53.1%, 0%, 37.3%)
CIE-LAB	lab(33.69, 17.24, -50.37)
CIE-LCH	lch(33.69, 53.24, 288.89°)
OKLab	oklab(43.43% -0.0209 -0.1452)
OKLCH	oklch(43.43% 0.147 261.8)
XYZ	xyz(9.4240, 7.8604, 34.2714)
Luminance	0.0786 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4BA0 #A0741F

analogous

#1F8BA0 #1F4BA0 #341FA0

triadic

#1F4BA0 #A01F4B #4BA01F

tetradic

#1F4BA0 #A01F8B #A0741F #1FA034

square

#1F4BA0 #A01F8B #A0741F #1FA034

split-complementary

#1F4BA0 #A0341F #8BA01F

monochromatic

#0B1B39 #15336D #1F4BA0 #2963D3 #5A88DF

Accessibility & contrast

On white

8.16

#1F4BA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#1F4BA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4BA0

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4BA0	#FFFFFF	#000000	##FFFFFF
##1F4BA0	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D55A3

Deuteranopia (green-blind)

#004A9E

Tritanopia (blue-blind)

#00606E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4ba0;
/* rgb */ color: rgb(31, 75, 160);
/* oklch */ color: oklch(43.4% 0.147 261.8);

Tailwind

colors: {
  custom: {
    50: '#707cbd',
    500: '#1f4ba0',
    950: '#000000',
  },
}

SCSS

$custom: #1f4ba0;
$custom-light: #707cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4ba0",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 160
  },
  "hsl": {
    "h": 219.535,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.43425,
    "c": 0.14665,
    "h": 261.8
  },
  "luminance": 0.07862
}

Semantic roles & 50–950 ramp

primary

#1F4BA0

secondary

#C39E58

accent

#AF3DEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4BA0

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

Preview Lab → · Contrast checker → · Palette generator →