#1C45B3#1C45B3

#1C45B3 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.7% C 0.181 H 264.4°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#1C45B3
RGB	rgb(28, 69, 179)
HSL	hsl(224, 73%, 41%)
HSV	hsv(224, 84%, 70%)
CMYK	cmyk(84.4%, 61.5%, 0%, 29.8%)
CIE-LAB	lab(33.47, 28.50, -62.09)
CIE-LCH	lch(33.47, 68.31, 294.66°)
OKLab	oklab(43.71% -0.0177 -0.1797)
OKLCH	oklch(43.71% 0.181 264.4)
XYZ	xyz(10.7408, 7.7565, 43.5701)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C45B3 #B38A1C

analogous

#1C90B3 #1C45B3 #3F1CB3

triadic

#1C45B3 #B31C45 #45B31C

tetradic

#1C45B3 #B31C90 #B38A1C #1CB33F

square

#1C45B3 #B31C90 #B38A1C #1CB33F

split-complementary

#1C45B3 #B33F1C #90B31C

monochromatic

#0B1C49 #14317E #1C45B3 #2E5EDE #6387E7

Accessibility & contrast

On white

8.23

#1C45B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1C45B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C45B3

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C45B3	#FFFFFF	#000000	##FFFFFF
##1C45B3	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#006275

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1c45b3;
/* rgb */ color: rgb(28, 69, 179);
/* oklch */ color: oklch(43.7% 0.181 264.4);

Tailwind

colors: {
  custom: {
    50: '#7578cb',
    500: '#1c45b3',
    950: '#000000',
  },
}

SCSS

$custom: #1c45b3;
$custom-light: #7578cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c45b3",
  "rgb": {
    "r": 28,
    "g": 69,
    "b": 179
  },
  "hsl": {
    "h": 223.709,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.43708,
    "c": 0.18058,
    "h": 264.4
  },
  "luminance": 0.07758
}

Semantic roles & 50–950 ramp

primary

#1C45B3

secondary

#CBAE5F

accent

#BE38F0

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1C45B3

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

Preview Lab → · Contrast checker → · Palette generator →