#1F478F#1F478F

#1F478F is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.2% C 0.128 H 261.0°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F478F
RGB	rgb(31, 71, 143)
HSL	hsl(219, 64%, 34%)
HSV	hsv(219, 78%, 56%)
CMYK	cmyk(78.3%, 50.3%, 0%, 43.9%)
CIE-LAB	lab(31.30, 13.16, -43.91)
CIE-LCH	lch(31.30, 45.84, 286.68°)
OKLab	oklab(41.21% -0.0199 -0.1262)
OKLCH	oklch(41.21% 0.128 261)
XYZ	xyz(7.7744, 6.7801, 26.8802)
Luminance	0.0678 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F478F #8F671F

analogous

#1F7F8F #1F478F #2F1F8F

triadic

#1F478F #8F1F47 #478F1F

tetradic

#1F478F #8F1F7F #8F671F #1F8F2F

square

#1F478F #8F1F7F #8F671F #1F8F2F

split-complementary

#1F478F #8F2F1F #7F8F1F

monochromatic

#09152A #142E5D #1F478F #2A60C1 #4F81D9

Accessibility & contrast

On white

8.91

#1F478F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1F478F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F478F

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F478F	#FFFFFF	#000000	##FFFFFF
##1F478F	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4F92

Deuteranopia (green-blind)

#00458E

Tritanopia (blue-blind)

#005864

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f478f;
/* rgb */ color: rgb(31, 71, 143);
/* oklch */ color: oklch(41.2% 0.128 261.0);

Tailwind

colors: {
  custom: {
    50: '#6c79b0',
    500: '#1f478f',
    950: '#000000',
  },
}

SCSS

$custom: #1f478f;
$custom-light: #6c79b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f478f",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 143
  },
  "hsl": {
    "h": 218.571,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.41211,
    "c": 0.12778,
    "h": 261
  },
  "luminance": 0.06781
}

Semantic roles & 50–950 ramp

primary

#1F478F

secondary

#BC954E

accent

#AC40E7

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #1F478F

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

Preview Lab → · Contrast checker → · Palette generator →