#1F478C#1F478C

#1F478C is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.0% C 0.123 H 260.5°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F478C
RGB	rgb(31, 71, 140)
HSL	hsl(218, 64%, 34%)
HSV	hsv(218, 78%, 55%)
CMYK	cmyk(77.9%, 49.3%, 0%, 45.1%)
CIE-LAB	lab(31.09, 11.96, -42.41)
CIE-LCH	lch(31.09, 44.06, 285.74°)
OKLab	oklab(40.98% -0.0204 -0.1218)
OKLCH	oklch(40.98% 0.123 260.5)
XYZ	xyz(7.5502, 6.6904, 25.6993)
Luminance	0.0669 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F478C #8C641F

analogous

#1F7D8C #1F478C #2D1F8C

triadic

#1F478C #8C1F47 #478C1F

tetradic

#1F478C #8C1F7D #8C641F #1F8C2D

square

#1F478C #8C1F7D #8C641F #1F8C2D

split-complementary

#1F478C #8C2D1F #7D8C1F

monochromatic

#091428 #142E5A #1F478C #2A60BE #4E80D8

Accessibility & contrast

On white

8.98

#1F478C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1F478C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F478C

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F478C	#FFFFFF	#000000	##FFFFFF
##1F478C	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204E8F

Deuteranopia (green-blind)

#00448B

Tritanopia (blue-blind)

#005762

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f478c;
/* rgb */ color: rgb(31, 71, 140);
/* oklch */ color: oklch(41.0% 0.123 260.5);

Tailwind

colors: {
  custom: {
    50: '#6b79ae',
    500: '#1f478c',
    950: '#000000',
  },
}

SCSS

$custom: #1f478c;
$custom-light: #6b79ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f478c",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 140
  },
  "hsl": {
    "h": 217.982,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.40983,
    "c": 0.12349,
    "h": 260.5
  },
  "luminance": 0.06691
}

Semantic roles & 50–950 ramp

primary

#1F478C

secondary

#BB924C

accent

#AA41E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F478C

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

Preview Lab → · Contrast checker → · Palette generator →