#1F2A9A#1F2A9A

#1F2A9A is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.5% C 0.179 H 269.7°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#1F2A9A
RGB	rgb(31, 42, 154)
HSL	hsl(235, 66%, 36%)
HSV	hsv(235, 80%, 60%)
CMYK	cmyk(79.9%, 72.7%, 0%, 39.6%)
CIE-LAB	lab(24.57, 36.90, -61.63)
CIE-LCH	lch(24.57, 71.83, 300.91°)
OKLab	oklab(36.5% -0.0009 -0.1785)
OKLCH	oklch(36.5% 0.179 269.7)
XYZ	xyz(7.2238, 4.2795, 31.0109)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2A9A #9A8F1F

analogous

#1F689A #1F2A9A #521F9A

triadic

#1F2A9A #9A1F2A #2A9A1F

tetradic

#1F2A9A #9A1F68 #9A8F1F #1F9A52

square

#1F2A9A #9A1F68 #9A8F1F #1F9A52

split-complementary

#1F2A9A #9A521F #689A1F

monochromatic

#0A0E34 #151C67 #1F2A9A #2938CD #5662DD

Accessibility & contrast

On white

11.31

#1F2A9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1F2A9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2A9A

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2A9A	#FFFFFF	#000000	##FFFFFF
##1F2A9A	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00409D

Deuteranopia (green-blind)

#003498

Tritanopia (blue-blind)

#004A5F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f2a9a;
/* rgb */ color: rgb(31, 42, 154);
/* oklch */ color: oklch(36.5% 0.179 269.7);

Tailwind

colors: {
  custom: {
    50: '#7164b9',
    500: '#1f2a9a',
    950: '#000000',
  },
}

SCSS

$custom: #1f2a9a;
$custom-light: #7164b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2a9a",
  "rgb": {
    "r": 31,
    "g": 42,
    "b": 154
  },
  "hsl": {
    "h": 234.634,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36501,
    "c": 0.17851,
    "h": 269.7
  },
  "luminance": 0.0428
}

Semantic roles & 50–950 ramp

primary

#1F2A9A

secondary

#C1B754

accent

#DA3EE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090512

muted

#7B7A81

Preview Lab

Preview with #1F2A9A

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

Preview Lab → · Contrast checker → · Palette generator →