#1F458C#1F458C

#1F458C is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.5% C 0.126 H 261.5°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#1F458C
RGB	rgb(31, 69, 140)
HSL	hsl(219, 64%, 34%)
HSV	hsv(219, 78%, 55%)
CMYK	cmyk(77.9%, 50.7%, 0%, 45.1%)
CIE-LAB	lab(30.50, 13.32, -43.37)
CIE-LCH	lch(30.50, 45.37, 287.08°)
OKLab	oklab(40.53% -0.0186 -0.1247)
OKLCH	oklch(40.53% 0.126 261.5)
XYZ	xyz(7.4251, 6.4402, 25.6576)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F458C #8C661F

analogous

#1F7B8C #1F458C #301F8C

triadic

#1F458C #8C1F45 #458C1F

tetradic

#1F458C #8C1F7B #8C661F #1F8C30

square

#1F458C #8C1F7B #8C661F #1F8C30

split-complementary

#1F458C #8C301F #7B8C1F

monochromatic

#091428 #142C5A #1F458C #2A5EBE #4E7ED8

Accessibility & contrast

On white

9.18

#1F458C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1F458C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F458C

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F458C	#FFFFFF	#000000	##FFFFFF
##1F458C	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4D8F

Deuteranopia (green-blind)

#00438B

Tritanopia (blue-blind)

#005662

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f458c;
/* rgb */ color: rgb(31, 69, 140);
/* oklch */ color: oklch(40.5% 0.126 261.5);

Tailwind

colors: {
  custom: {
    50: '#6c78ae',
    500: '#1f458c',
    950: '#000000',
  },
}

SCSS

$custom: #1f458c;
$custom-light: #6c78ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f458c",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 140
  },
  "hsl": {
    "h": 219.083,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.40527,
    "c": 0.12605,
    "h": 261.5
  },
  "luminance": 0.06441
}

Semantic roles & 50–950 ramp

primary

#1F458C

secondary

#BB944C

accent

#AD41E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F458C

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

Preview Lab → · Contrast checker → · Palette generator →