#1F458F#1F458F

#1F458F is a dark, vivid blue. Relative luminance 0.065; OKLCH L 40.8% C 0.130 H 262.0°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#1F458F
RGB	rgb(31, 69, 143)
HSL	hsl(220, 64%, 34%)
HSV	hsv(220, 78%, 56%)
CMYK	cmyk(78.3%, 51.7%, 0%, 43.9%)
CIE-LAB	lab(30.71, 14.53, -44.86)
CIE-LCH	lch(30.71, 47.16, 287.95°)
OKLab	oklab(40.76% -0.0182 -0.1291)
OKLCH	oklch(40.76% 0.13 262)
XYZ	xyz(7.6493, 6.5298, 26.8385)
Luminance	0.0653 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F458F #8F691F

analogous

#1F7D8F #1F458F #311F8F

triadic

#1F458F #8F1F45 #458F1F

tetradic

#1F458F #8F1F7D #8F691F #1F8F31

square

#1F458F #8F1F7D #8F691F #1F8F31

split-complementary

#1F458F #8F311F #7D8F1F

monochromatic

#09142A #142D5D #1F458F #2A5DC1 #4F7ED9

Accessibility & contrast

On white

9.11

#1F458F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1F458F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F458F

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F458F	#FFFFFF	#000000	##FFFFFF
##1F458F	1.00	9.11	2.31	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174E92

Deuteranopia (green-blind)

#00438E

Tritanopia (blue-blind)

#005763

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f458f;
/* rgb */ color: rgb(31, 69, 143);
/* oklch */ color: oklch(40.8% 0.130 262.0);

Tailwind

colors: {
  custom: {
    50: '#6c78b0',
    500: '#1f458f',
    950: '#000000',
  },
}

SCSS

$custom: #1f458f;
$custom-light: #6c78b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f458f",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 143
  },
  "hsl": {
    "h": 219.643,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.4076,
    "c": 0.13034,
    "h": 262
  },
  "luminance": 0.06531
}

Semantic roles & 50–950 ramp

primary

#1F458F

secondary

#BC974E

accent

#AF40E7

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #1F458F

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

Preview Lab → · Contrast checker → · Palette generator →