#1F45A1#1F45A1

#1F45A1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.2% C 0.156 H 263.9°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F45A1
RGB	rgb(31, 69, 161)
HSL	hsl(222, 68%, 38%)
HSV	hsv(222, 81%, 63%)
CMYK	cmyk(80.7%, 57.1%, 0%, 36.9%)
CIE-LAB	lab(32.08, 21.71, -53.59)
CIE-LCH	lch(32.08, 57.82, 292.05°)
OKLab	oklab(42.23% -0.0165 -0.1547)
OKLCH	oklch(42.23% 0.156 263.9)
XYZ	xyz(9.1239, 7.1197, 34.6047)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F45A1 #A17B1F

analogous

#1F86A1 #1F45A1 #3A1FA1

triadic

#1F45A1 #A11F45 #45A11F

tetradic

#1F45A1 #A11F86 #A17B1F #1FA13A

square

#1F45A1 #A11F86 #A17B1F #1FA13A

split-complementary

#1F45A1 #A13A1F #86A11F

monochromatic

#0B193A #152F6E #1F45A1 #295BD4 #5B82DF

Accessibility & contrast

On white

8.66

#1F45A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#1F45A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F45A1

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F45A1	#FFFFFF	#000000	##FFFFFF
##1F45A1	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A4

Deuteranopia (green-blind)

#00469F

Tritanopia (blue-blind)

#005C6C

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f45a1;
/* rgb */ color: rgb(31, 69, 161);
/* oklch */ color: oklch(42.2% 0.156 263.9);

Tailwind

colors: {
  custom: {
    50: '#7178be',
    500: '#1f45a1',
    950: '#000000',
  },
}

SCSS

$custom: #1f45a1;
$custom-light: #7178be;
$custom-dark: #000000;

JSON

{
  "hex": "#1f45a1",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 161
  },
  "hsl": {
    "h": 222.462,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.42228,
    "c": 0.15561,
    "h": 263.9
  },
  "luminance": 0.07121
}

Semantic roles & 50–950 ramp

primary

#1F45A1

secondary

#C4A458

accent

#B83DEB

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F45A1

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

Preview Lab → · Contrast checker → · Palette generator →