#1C4B99#1C4B99

#1C4B99 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 42.8% C 0.138 H 260.1°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#1C4B99
RGB	rgb(28, 75, 153)
HSL	hsl(217, 69%, 35%)
HSV	hsv(217, 82%, 60%)
CMYK	cmyk(81.7%, 51%, 0%, 40%)
CIE-LAB	lab(33.09, 14.12, -47.13)
CIE-LCH	lch(33.09, 49.19, 286.68°)
OKLab	oklab(42.78% -0.0237 -0.1356)
OKLCH	oklch(42.78% 0.138 260.1)
XYZ	xyz(8.7426, 7.5779, 31.1327)
Luminance	0.0758 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4B99 #996A1C

analogous

#1C8999 #1C4B99 #2B1C99

triadic

#1C4B99 #991C4B #4B991C

tetradic

#1C4B99 #991C89 #996A1C #1C992B

square

#1C4B99 #991C89 #996A1C #1C992B

split-complementary

#1C4B99 #992B1C #89991C

monochromatic

#091832 #133265 #1C4B99 #2564CD #5086DF

Accessibility & contrast

On white

8.35

#1C4B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1C4B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4B99

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4B99	#FFFFFF	#000000	##FFFFFF
##1C4B99	1.00	8.35	2.52	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A549C

Deuteranopia (green-blind)

#004897

Tritanopia (blue-blind)

#005E6A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1c4b99;
/* rgb */ color: rgb(28, 75, 153);
/* oklch */ color: oklch(42.8% 0.138 260.1);

Tailwind

colors: {
  custom: {
    50: '#6e7cb8',
    500: '#1c4b99',
    950: '#000000',
  },
}

SCSS

$custom: #1c4b99;
$custom-light: #6e7cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4b99",
  "rgb": {
    "r": 28,
    "g": 75,
    "b": 153
  },
  "hsl": {
    "h": 217.44,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.42777,
    "c": 0.13769,
    "h": 260.1
  },
  "luminance": 0.07579
}

Semantic roles & 50–950 ramp

primary

#1C4B99

secondary

#C2974F

accent

#AA3CEC

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1C4B99

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

Preview Lab → · Contrast checker → · Palette generator →