#1F488C#1F488C

#1F488C is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.2% C 0.122 H 260.0°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#1F488C
RGB	rgb(31, 72, 140)
HSL	hsl(217, 64%, 34%)
HSV	hsv(217, 78%, 55%)
CMYK	cmyk(77.9%, 48.6%, 0%, 45.1%)
CIE-LAB	lab(31.39, 11.27, -41.93)
CIE-LCH	lch(31.39, 43.42, 285.05°)
OKLab	oklab(41.21% -0.0212 -0.1204)
OKLCH	oklch(41.21% 0.122 260)
XYZ	xyz(7.6143, 6.8186, 25.7207)
Luminance	0.0682 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F488C #8C631F

analogous

#1F7E8C #1F488C #2C1F8C

triadic

#1F488C #8C1F48 #488C1F

tetradic

#1F488C #8C1F7E #8C631F #1F8C2C

square

#1F488C #8C1F7E #8C631F #1F8C2C

split-complementary

#1F488C #8C2C1F #7E8C1F

monochromatic

#091428 #142E5A #1F488C #2A62BE #4E82D8

Accessibility & contrast

On white

8.88

#1F488C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1F488C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F488C

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F488C	#FFFFFF	#000000	##FFFFFF
##1F488C	1.00	8.88	2.36	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234F8F

Deuteranopia (green-blind)

#03458B

Tritanopia (blue-blind)

#005863

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f488c;
/* rgb */ color: rgb(31, 72, 140);
/* oklch */ color: oklch(41.2% 0.122 260.0);

Tailwind

colors: {
  custom: {
    50: '#6b7aae',
    500: '#1f488c',
    950: '#000000',
  },
}

SCSS

$custom: #1f488c;
$custom-light: #6b7aae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f488c",
  "rgb": {
    "r": 31,
    "g": 72,
    "b": 140
  },
  "hsl": {
    "h": 217.431,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.41213,
    "c": 0.12222,
    "h": 260
  },
  "luminance": 0.06819
}

Semantic roles & 50–950 ramp

primary

#1F488C

secondary

#BB914C

accent

#A841E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F488C

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

Preview Lab → · Contrast checker → · Palette generator →