#1C428B#1C428B

#1C428B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.7% C 0.129 H 261.8°. Best body text is #FFFFFF at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#1C428B
RGB	rgb(28, 66, 139)
HSL	hsl(219, 66%, 33%)
HSV	hsv(219, 80%, 55%)
CMYK	cmyk(79.9%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(29.43, 14.62, -44.48)
CIE-LCH	lch(29.43, 46.82, 288.19°)
OKLab	oklab(39.66% -0.0185 -0.128)
OKLCH	oklch(39.66% 0.129 261.8)
XYZ	xyz(7.0856, 6.0066, 25.2070)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C428B #8B651C

analogous

#1C7A8B #1C428B #2D1C8B

triadic

#1C428B #8B1C42 #428B1C

tetradic

#1C428B #8B1C7A #8B651C #1C8B2D

square

#1C428B #8B1C7A #8B651C #1C8B2D

split-complementary

#1C428B #8B2D1C #7A8B1C

monochromatic

#071225 #122A58 #1C428B #265ABE #477ADA

Accessibility & contrast

On white

9.54

#1C428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1C428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C428B

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C428B	#FFFFFF	#000000	##FFFFFF
##1C428B	1.00	9.54	2.20	9.54
#FFFFFF	9.54	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124B8E

Deuteranopia (green-blind)

#00418A

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1c428b;
/* rgb */ color: rgb(28, 66, 139);
/* oklch */ color: oklch(39.7% 0.129 261.8);

Tailwind

colors: {
  custom: {
    50: '#6a75ad',
    500: '#1c428b',
    950: '#000000',
  },
}

SCSS

$custom: #1c428b;
$custom-light: #6a75ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1c428b",
  "rgb": {
    "r": 28,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 219.459,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39658,
    "c": 0.12937,
    "h": 261.8
  },
  "luminance": 0.06007
}

Semantic roles & 50–950 ramp

primary

#1C428B

secondary

#BC9447

accent

#AF3EE9

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1C428B

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

Preview Lab → · Contrast checker → · Palette generator →