#1F4D9C#1F4D9C

#1F4D9C is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.6% C 0.139 H 260.5°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#1F4D9C
RGB	rgb(31, 77, 156)
HSL	hsl(218, 67%, 37%)
HSV	hsv(218, 80%, 61%)
CMYK	cmyk(80.1%, 50.6%, 0%, 38.8%)
CIE-LAB	lab(33.98, 14.29, -47.50)
CIE-LCH	lch(33.98, 49.60, 286.74°)
OKLab	oklab(43.55% -0.0229 -0.1366)
OKLCH	oklch(43.55% 0.139 260.5)
XYZ	xyz(9.2175, 7.9983, 32.5041)
Luminance	0.0800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4D9C #9C6E1F

analogous

#1F8C9C #1F4D9C #301F9C

triadic

#1F4D9C #9C1F4D #4D9C1F

tetradic

#1F4D9C #9C1F8C #9C6E1F #1F9C30

square

#1F4D9C #9C1F8C #9C6E1F #1F9C30

split-complementary

#1F4D9C #9C301F #8C9C1F

monochromatic

#0B1B36 #153469 #1F4D9C #2966CF #5889DE

Accessibility & contrast

On white

8.08

#1F4D9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#1F4D9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4D9C

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4D9C	#FFFFFF	#000000	##FFFFFF
##1F4D9C	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D569F

Deuteranopia (green-blind)

#004B9A

Tritanopia (blue-blind)

#00606D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4d9c;
/* rgb */ color: rgb(31, 77, 156);
/* oklch */ color: oklch(43.6% 0.139 260.5);

Tailwind

colors: {
  custom: {
    50: '#6f7eba',
    500: '#1f4d9c',
    950: '#000000',
  },
}

SCSS

$custom: #1f4d9c;
$custom-light: #6f7eba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4d9c",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 156
  },
  "hsl": {
    "h": 217.92,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.43554,
    "c": 0.13856,
    "h": 260.5
  },
  "luminance": 0.07999
}

Semantic roles & 50–950 ramp

primary

#1F4D9C

secondary

#C19A55

accent

#AB3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4D9C

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

Preview Lab → · Contrast checker → · Palette generator →