#1F297F#1F297F

#1F297F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.5% C 0.144 H 271.0°. Best body text is #FFFFFF at 12.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F297F
RGB	rgb(31, 41, 127)
HSL	hsl(234, 61%, 31%)
HSV	hsv(234, 76%, 50%)
CMYK	cmyk(75.6%, 67.7%, 0%, 50.2%)
CIE-LAB	lab(21.61, 27.54, -49.70)
CIE-LCH	lch(21.61, 56.82, 298.99°)
OKLab	oklab(33.53% 0.0025 -0.1437)
OKLCH	oklch(33.53% 0.144 271)
XYZ	xyz(5.1875, 3.4090, 20.4592)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F297F #7F751F

analogous

#1F597F #1F297F #451F7F

triadic

#1F297F #7F1F29 #297F1F

tetradic

#1F297F #7F1F59 #7F751F #1F7F45

square

#1F297F #7F1F59 #7F751F #1F7F45

split-complementary

#1F297F #7F451F #597F1F

monochromatic

#07091D #13194E #1F297F #2B39B0 #4655D2

Accessibility & contrast

On white

12.49

#1F297F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F297F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F297F

12.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F297F	#FFFFFF	#000000	##FFFFFF
##1F297F	1.00	12.49	1.68	12.49
#FFFFFF	12.49	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003882

Deuteranopia (green-blind)

#002F7D

Tritanopia (blue-blind)

#004050

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f297f;
/* rgb */ color: rgb(31, 41, 127);
/* oklch */ color: oklch(33.5% 0.144 271.0);

Tailwind

colors: {
  custom: {
    50: '#6a63a5',
    500: '#1f297f',
    950: '#000000',
  },
}

SCSS

$custom: #1f297f;
$custom-light: #6a63a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f297f",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 127
  },
  "hsl": {
    "h": 233.75,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33532,
    "c": 0.14371,
    "h": 271
  },
  "luminance": 0.03409
}

Semantic roles & 50–950 ramp

primary

#1F297F

secondary

#B2A748

accent

#D344E4

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F297F

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

Preview Lab → · Contrast checker → · Palette generator →