#1F45AD#1F45AD

#1F45AD is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.3% C 0.172 H 264.7°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#1F45AD
RGB	rgb(31, 69, 173)
HSL	hsl(224, 70%, 40%)
HSV	hsv(224, 82%, 68%)
CMYK	cmyk(82.1%, 60.1%, 0%, 32.2%)
CIE-LAB	lab(33.06, 26.41, -59.19)
CIE-LCH	lch(33.06, 64.82, 294.05°)
OKLab	oklab(43.27% -0.0159 -0.1712)
OKLCH	oklch(43.27% 0.172 264.7)
XYZ	xyz(10.2333, 7.5635, 40.4476)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F45AD #AD871F

analogous

#1F8CAD #1F45AD #401FAD

triadic

#1F45AD #AD1F45 #45AD1F

tetradic

#1F45AD #AD1F8C #AD871F #1FAD40

square

#1F45AD #AD1F8C #AD871F #1FAD40

split-complementary

#1F45AD #AD401F #8CAD1F

monochromatic

#0C1C45 #163079 #1F45AD #2F5DDA #6385E3

Accessibility & contrast

On white

8.36

#1F45AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1F45AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F45AD

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F45AD	#FFFFFF	#000000	##FFFFFF
##1F45AD	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B0

Deuteranopia (green-blind)

#0047AB

Tritanopia (blue-blind)

#006072

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f45ad;
/* rgb */ color: rgb(31, 69, 173);
/* oklch */ color: oklch(43.3% 0.172 264.7);

Tailwind

colors: {
  custom: {
    50: '#7478c6',
    500: '#1f45ad',
    950: '#000000',
  },
}

SCSS

$custom: #1f45ad;
$custom-light: #7478c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f45ad",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 173
  },
  "hsl": {
    "h": 223.944,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.43268,
    "c": 0.17192,
    "h": 264.7
  },
  "luminance": 0.07565
}

Semantic roles & 50–950 ramp

primary

#1F45AD

secondary

#C8AC60

accent

#BD3BEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F45AD

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

Preview Lab → · Contrast checker → · Palette generator →