#1F478B#1F478B

#1F478B is a dark, vivid blue. Relative luminance 0.067; OKLCH L 40.9% C 0.122 H 260.3°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#1F478B
RGB	rgb(31, 71, 139)
HSL	hsl(218, 64%, 33%)
HSV	hsv(218, 78%, 55%)
CMYK	cmyk(77.7%, 48.9%, 0%, 45.5%)
CIE-LAB	lab(31.02, 11.55, -41.90)
CIE-LCH	lch(31.02, 43.47, 285.42°)
OKLab	oklab(40.91% -0.0205 -0.1203)
OKLCH	oklch(40.91% 0.122 260.3)
XYZ	xyz(7.4768, 6.6610, 25.3127)
Luminance	0.0666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F478B #8B631F

analogous

#1F7D8B #1F478B #2D1F8B

triadic

#1F478B #8B1F47 #478B1F

tetradic

#1F478B #8B1F7D #8B631F #1F8B2D

square

#1F478B #8B1F7D #8B631F #1F8B2D

split-complementary

#1F478B #8B2D1F #7D8B1F

monochromatic

#091427 #142D59 #1F478B #2A61BD #4D80D7

Accessibility & contrast

On white

9.00

#1F478B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1F478B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F478B

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F478B	#FFFFFF	#000000	##FFFFFF
##1F478B	1.00	9.00	2.33	9.00
#FFFFFF	9.00	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214E8E

Deuteranopia (green-blind)

#01448A

Tritanopia (blue-blind)

#005762

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f478b;
/* rgb */ color: rgb(31, 71, 139);
/* oklch */ color: oklch(40.9% 0.122 260.3);

Tailwind

colors: {
  custom: {
    50: '#6b79ad',
    500: '#1f478b',
    950: '#000000',
  },
}

SCSS

$custom: #1f478b;
$custom-light: #6b79ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f478b",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 139
  },
  "hsl": {
    "h": 217.778,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.40908,
    "c": 0.12205,
    "h": 260.3
  },
  "luminance": 0.06662
}

Semantic roles & 50–950 ramp

primary

#1F478B

secondary

#BA914C

accent

#A941E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F478B

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

Preview Lab → · Contrast checker → · Palette generator →