#1C377B#1C377B

#1C377B is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.121 H 264.7°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#1C377B
RGB	rgb(28, 55, 123)
HSL	hsl(223, 63%, 30%)
HSV	hsv(223, 77%, 48%)
CMYK	cmyk(77.2%, 55.3%, 0%, 51.8%)
CIE-LAB	lab(24.98, 15.81, -41.69)
CIE-LCH	lch(24.98, 44.59, 290.76°)
OKLab	oklab(35.89% -0.0112 -0.1201)
OKLCH	oklch(35.89% 0.121 264.7)
XYZ	xyz(5.4190, 4.4087, 19.3004)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C377B #7B601C

analogous

#1C677B #1C377B #301C7B

triadic

#1C377B #7B1C37 #377B1C

tetradic

#1C377B #7B1C67 #7B601C #1C7B30

square

#1C377B #7B1C67 #7B601C #1C7B30

split-complementary

#1C377B #7B301C #677B1C

monochromatic

#060B19 #112149 #1C377B #274DAD #3E69D3

Accessibility & contrast

On white

11.16

#1C377B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1C377B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C377B

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C377B	#FFFFFF	#000000	##FFFFFF
##1C377B	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05407D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004753

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1c377b;
/* rgb */ color: rgb(28, 55, 123);
/* oklch */ color: oklch(35.9% 0.121 264.7);

Tailwind

colors: {
  custom: {
    50: '#676da2',
    500: '#1c377b',
    950: '#000000',
  },
}

SCSS

$custom: #1c377b;
$custom-light: #676da2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c377b",
  "rgb": {
    "r": 28,
    "g": 55,
    "b": 123
  },
  "hsl": {
    "h": 222.947,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.35891,
    "c": 0.12058,
    "h": 264.7
  },
  "luminance": 0.04409
}

Semantic roles & 50–950 ramp

primary

#1C377B

secondary

#AF9044

accent

#B742E6

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1C377B

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

Preview Lab → · Contrast checker → · Palette generator →