#1F45AB#1F45AB

#1F45AB is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.1% C 0.169 H 264.6°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#1F45AB
RGB	rgb(31, 69, 171)
HSL	hsl(224, 69%, 40%)
HSV	hsv(224, 82%, 67%)
CMYK	cmyk(81.9%, 59.6%, 0%, 32.9%)
CIE-LAB	lab(32.89, 25.63, -58.27)
CIE-LCH	lch(32.89, 63.66, 293.75°)
OKLab	oklab(43.09% -0.016 -0.1685)
OKLCH	oklch(43.09% 0.169 264.6)
XYZ	xyz(10.0413, 7.4866, 39.4360)
Luminance	0.0749 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F45AB #AB851F

analogous

#1F8BAB #1F45AB #3F1FAB

triadic

#1F45AB #AB1F45 #45AB1F

tetradic

#1F45AB #AB1F8B #AB851F #1FAB3F

square

#1F45AB #AB1F8B #AB851F #1FAB3F

split-complementary

#1F45AB #AB3F1F #8BAB1F

monochromatic

#0C1B43 #163077 #1F45AB #2E5DD9 #6285E3

Accessibility & contrast

On white

8.41

#1F45AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1F45AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F45AB

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F45AB	#FFFFFF	#000000	##FFFFFF
##1F45AB	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054AE

Deuteranopia (green-blind)

#0047A9

Tritanopia (blue-blind)

#005F71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f45ab;
/* rgb */ color: rgb(31, 69, 171);
/* oklch */ color: oklch(43.1% 0.169 264.6);

Tailwind

colors: {
  custom: {
    50: '#7378c5',
    500: '#1f45ab',
    950: '#000000',
  },
}

SCSS

$custom: #1f45ab;
$custom-light: #7378c5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f45ab",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 171
  },
  "hsl": {
    "h": 223.714,
    "s": 69.307,
    "l": 39.608
  },
  "oklch": {
    "l": 0.43092,
    "c": 0.16922,
    "h": 264.6
  },
  "luminance": 0.07488
}

Semantic roles & 50–950 ramp

primary

#1F45AB

secondary

#C7AB5E

accent

#BC3CEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F45AB

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

Preview Lab → · Contrast checker → · Palette generator →