#1C378C#1C378C

#1C378C is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.145 H 266.0°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#1C378C
RGB	rgb(28, 55, 140)
HSL	hsl(226, 67%, 33%)
HSV	hsv(226, 80%, 55%)
CMYK	cmyk(80%, 60.7%, 0%, 45.1%)
CIE-LAB	lab(26.37, 22.66, -50.07)
CIE-LCH	lch(26.37, 54.96, 294.35°)
OKLab	oklab(37.37% -0.0102 -0.1447)
OKLCH	oklch(37.37% 0.145 266)
XYZ	xyz(6.5770, 4.8719, 25.3996)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C378C #8C711C

analogous

#1C6F8C #1C378C #391C8C

triadic

#1C378C #8C1C37 #378C1C

tetradic

#1C378C #8C1C6F #8C711C #1C8C39

square

#1C378C #8C1C6F #8C711C #1C8C39

split-complementary

#1C378C #8C391C #6F8C1C

monochromatic

#080F26 #122359 #1C378C #264BBF #486BDA

Accessibility & contrast

On white

10.64

#1C378C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1C378C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C378C

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C378C	#FFFFFF	#000000	##FFFFFF
##1C378C	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448F

Deuteranopia (green-blind)

#00398A

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1c378c;
/* rgb */ color: rgb(28, 55, 140);
/* oklch */ color: oklch(37.4% 0.145 266.0);

Tailwind

colors: {
  custom: {
    50: '#6c6dae',
    500: '#1c378c',
    950: '#000000',
  },
}

SCSS

$custom: #1c378c;
$custom-light: #6c6dae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c378c",
  "rgb": {
    "r": 28,
    "g": 55,
    "b": 140
  },
  "hsl": {
    "h": 225.536,
    "s": 66.667,
    "l": 32.941
  },
  "oklch": {
    "l": 0.37371,
    "c": 0.14504,
    "h": 266
  },
  "luminance": 0.04873
}

Semantic roles & 50–950 ramp

primary

#1C378C

secondary

#BCA048

accent

#C03EEA

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1C378C

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

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