#1F478A#1F478A

#1F478A is a dark, vivid blue. Relative luminance 0.066; OKLCH L 40.8% C 0.121 H 260.1°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#1F478A
RGB	rgb(31, 71, 138)
HSL	hsl(218, 63%, 33%)
HSV	hsv(218, 78%, 54%)
CMYK	cmyk(77.5%, 48.6%, 0%, 45.9%)
CIE-LAB	lab(30.95, 11.15, -41.40)
CIE-LCH	lch(30.95, 42.87, 285.08°)
OKLab	oklab(40.83% -0.0207 -0.1188)
OKLCH	oklch(40.83% 0.121 260.1)
XYZ	xyz(7.4041, 6.6319, 24.9297)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F478A #8A621F

analogous

#1F7C8A #1F478A #2C1F8A

triadic

#1F478A #8A1F47 #478A1F

tetradic

#1F478A #8A1F7C #8A621F #1F8A2C

square

#1F478A #8A1F7C #8A621F #1F8A2C

split-complementary

#1F478A #8A2C1F #7C8A1F

monochromatic

#091426 #142D58 #1F478A #2A61BC #4C80D7

Accessibility & contrast

On white

9.03

#1F478A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1F478A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F478A

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F478A	#FFFFFF	#000000	##FFFFFF
##1F478A	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224E8C

Deuteranopia (green-blind)

#044489

Tritanopia (blue-blind)

#005762

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f478a;
/* rgb */ color: rgb(31, 71, 138);
/* oklch */ color: oklch(40.8% 0.121 260.1);

Tailwind

colors: {
  custom: {
    50: '#6b79ad',
    500: '#1f478a',
    950: '#000000',
  },
}

SCSS

$custom: #1f478a;
$custom-light: #6b79ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f478a",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 138
  },
  "hsl": {
    "h": 217.57,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.40833,
    "c": 0.12062,
    "h": 260.1
  },
  "luminance": 0.06633
}

Semantic roles & 50–950 ramp

primary

#1F478A

secondary

#BA904B

accent

#A941E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F478A

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

Preview Lab → · Contrast checker → · Palette generator →