#1F45A8#1F45A8

#1F45A8 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 42.8% C 0.165 H 264.4°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F45A8
RGB	rgb(31, 69, 168)
HSL	hsl(223, 69%, 39%)
HSV	hsv(223, 82%, 66%)
CMYK	cmyk(81.5%, 58.9%, 0%, 34.1%)
CIE-LAB	lab(32.64, 24.46, -56.88)
CIE-LCH	lch(32.64, 61.92, 293.27°)
OKLab	oklab(42.83% -0.0161 -0.1644)
OKLCH	oklch(42.83% 0.165 264.4)
XYZ	xyz(9.7586, 7.3735, 37.9471)
Luminance	0.0737 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F45A8 #A8821F

analogous

#1F8AA8 #1F45A8 #3E1FA8

triadic

#1F45A8 #A81F45 #45A81F

tetradic

#1F45A8 #A81F8A #A8821F #1FA83E

square

#1F45A8 #A81F8A #A8821F #1FA83E

split-complementary

#1F45A8 #A83E1F #8AA81F

monochromatic

#0C1B41 #153074 #1F45A8 #2C5CD8 #6084E2

Accessibility & contrast

On white

8.48

#1F45A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1F45A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F45A8

8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F45A8	#FFFFFF	#000000	##FFFFFF
##1F45A8	1.00	8.48	2.47	8.48
#FFFFFF	8.48	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053AB

Deuteranopia (green-blind)

#0047A6

Tritanopia (blue-blind)

#005E6F

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f45a8;
/* rgb */ color: rgb(31, 69, 168);
/* oklch */ color: oklch(42.8% 0.165 264.4);

Tailwind

colors: {
  custom: {
    50: '#7378c3',
    500: '#1f45a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f45a8;
$custom-light: #7378c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f45a8",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 168
  },
  "hsl": {
    "h": 223.358,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.42829,
    "c": 0.16517,
    "h": 264.4
  },
  "luminance": 0.07375
}

Semantic roles & 50–950 ramp

primary

#1F45A8

secondary

#C6A95D

accent

#BB3CEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1F45A8

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

Preview Lab → · Contrast checker → · Palette generator →