#1C378E#1C378E

#1C378E is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.6% C 0.148 H 266.1°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#1C378E
RGB	rgb(28, 55, 142)
HSL	hsl(226, 67%, 33%)
HSV	hsv(226, 80%, 56%)
CMYK	cmyk(80.3%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(26.54, 23.45, -51.03)
CIE-LCH	lch(26.54, 56.16, 294.68°)
OKLab	oklab(37.55% -0.0101 -0.1475)
OKLCH	oklch(37.55% 0.148 266.1)
XYZ	xyz(6.7258, 4.9315, 26.1833)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C378E #8E731C

analogous

#1C708E #1C378E #3A1C8E

triadic

#1C378E #8E1C37 #378E1C

tetradic

#1C378E #8E1C70 #8E731C #1C8E3A

square

#1C378E #8E1C70 #8E731C #1C8E3A

split-complementary

#1C378E #8E3A1C #708E1C

monochromatic

#080F28 #12235B #1C378E #264BC1 #496CDB

Accessibility & contrast

On white

10.57

#1C378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1C378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C378E

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C378E	#FFFFFF	#000000	##FFFFFF
##1C378E	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004491

Deuteranopia (green-blind)

#003A8C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1c378e;
/* rgb */ color: rgb(28, 55, 142);
/* oklch */ color: oklch(37.6% 0.148 266.1);

Tailwind

colors: {
  custom: {
    50: '#6c6db0',
    500: '#1c378e',
    950: '#000000',
  },
}

SCSS

$custom: #1c378e;
$custom-light: #6c6db0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c378e",
  "rgb": {
    "r": 28,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 225.789,
    "s": 67.059,
    "l": 33.333
  },
  "oklch": {
    "l": 0.37552,
    "c": 0.14784,
    "h": 266.1
  },
  "luminance": 0.04932
}

Semantic roles & 50–950 ramp

primary

#1C378E

secondary

#BDA249

accent

#C13EEA

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1C378E

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

Preview Lab → · Contrast checker → · Palette generator →