#1C4D9B#1C4D9B

#1C4D9B is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.4% C 0.138 H 259.6°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#1C4D9B
RGB	rgb(28, 77, 155)
HSL	hsl(217, 69%, 36%)
HSV	hsv(217, 82%, 61%)
CMYK	cmyk(81.9%, 50.3%, 0%, 39.2%)
CIE-LAB	lab(33.82, 13.57, -47.16)
CIE-LCH	lch(33.82, 49.07, 286.05°)
OKLab	oklab(43.38% -0.025 -0.1357)
OKLCH	oklch(43.38% 0.138 259.6)
XYZ	xyz(9.0470, 7.9201, 32.0559)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4D9B #9B6A1C

analogous

#1C8C9B #1C4D9B #2A1C9B

triadic

#1C4D9B #9B1C4D #4D9B1C

tetradic

#1C4D9B #9B1C8C #9B6A1C #1C9B2A

square

#1C4D9B #9B1C8C #9B6A1C #1C9B2A

split-complementary

#1C4D9B #9B2A1C #8C9B1C

monochromatic

#091933 #133367 #1C4D9B #2567CF #5288E0

Accessibility & contrast

On white

8.13

#1C4D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#1C4D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4D9B

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4D9B	#FFFFFF	#000000	##FFFFFF
##1C4D9B	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E569E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1c4d9b;
/* rgb */ color: rgb(28, 77, 155);
/* oklch */ color: oklch(43.4% 0.138 259.6);

Tailwind

colors: {
  custom: {
    50: '#6e7eb9',
    500: '#1c4d9b',
    950: '#000000',
  },
}

SCSS

$custom: #1c4d9b;
$custom-light: #6e7eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4d9b",
  "rgb": {
    "r": 28,
    "g": 77,
    "b": 155
  },
  "hsl": {
    "h": 216.85,
    "s": 69.399,
    "l": 35.882
  },
  "oklch": {
    "l": 0.4338,
    "c": 0.13798,
    "h": 259.6
  },
  "luminance": 0.07921
}

Semantic roles & 50–950 ramp

primary

#1C4D9B

secondary

#C39650

accent

#A83CEC

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1C4D9B

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

Preview Lab → · Contrast checker → · Palette generator →