#1F2A7B#1F2A7B

#1F2A7B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.3% C 0.137 H 270.9°. Best body text is #FFFFFF at 12.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F2A7B
RGB	rgb(31, 42, 123)
HSL	hsl(233, 60%, 30%)
HSV	hsv(233, 75%, 48%)
CMYK	cmyk(74.8%, 65.9%, 0%, 51.8%)
CIE-LAB	lab(21.49, 25.32, -47.36)
CIE-LCH	lch(21.49, 53.71, 298.13°)
OKLab	oklab(33.33% 0.0021 -0.1368)
OKLCH	oklch(33.33% 0.137 270.9)
XYZ	xyz(4.9670, 3.3768, 19.1251)
Luminance	0.0338 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2A7B #7B701F

analogous

#1F587B #1F2A7B #421F7B

triadic

#1F2A7B #7B1F2A #2A7B1F

tetradic

#1F2A7B #7B1F58 #7B701F #1F7B42

square

#1F2A7B #7B1F58 #7B701F #1F7B42

split-complementary

#1F2A7B #7B421F #587B1F

monochromatic

#060919 #13194A #1F2A7B #2B3BAC #4455D0

Accessibility & contrast

On white

12.53

#1F2A7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F2A7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2A7B

12.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2A7B	#FFFFFF	#000000	##FFFFFF
##1F2A7B	1.00	12.53	1.68	12.53
#FFFFFF	12.53	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387E

Deuteranopia (green-blind)

#002F79

Tritanopia (blue-blind)

#003F4E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f2a7b;
/* rgb */ color: rgb(31, 42, 123);
/* oklch */ color: oklch(33.3% 0.137 270.9);

Tailwind

colors: {
  custom: {
    50: '#6963a2',
    500: '#1f2a7b',
    950: '#000000',
  },
}

SCSS

$custom: #1f2a7b;
$custom-light: #6963a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2a7b",
  "rgb": {
    "r": 31,
    "g": 42,
    "b": 123
  },
  "hsl": {
    "h": 232.826,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.33329,
    "c": 0.13685,
    "h": 270.9
  },
  "luminance": 0.03377
}

Semantic roles & 50–950 ramp

primary

#1F2A7B

secondary

#AEA248

accent

#D045E3

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F2A7B

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

Preview Lab → · Contrast checker → · Palette generator →