#1C4580#1C4580

#1C4580 is a dark, moderate blue. Relative luminance 0.061; OKLCH L 39.5% C 0.110 H 257.9°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#1C4580
RGB	rgb(28, 69, 128)
HSL	hsl(215, 64%, 31%)
HSV	hsv(215, 78%, 50%)
CMYK	cmyk(78.1%, 46.1%, 0%, 49.8%)
CIE-LAB	lab(29.57, 8.09, -37.44)
CIE-LCH	lch(29.57, 38.30, 282.19°)
OKLab	oklab(39.52% -0.0229 -0.1073)
OKLCH	oklch(39.52% 0.11 257.9)
XYZ	xyz(6.5019, 6.0609, 21.2451)
Luminance	0.0606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4580 #80571C

analogous

#1C7780 #1C4580 #251C80

triadic

#1C4580 #801C45 #45801C

tetradic

#1C4580 #801C77 #80571C #1C8025

square

#1C4580 #801C77 #80571C #1C8025

split-complementary

#1C4580 #80251C #77801C

monochromatic

#060F1C #112A4E #1C4580 #2760B2 #417ED5

Accessibility & contrast

On white

9.49

#1C4580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1C4580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4580

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4580	#FFFFFF	#000000	##FFFFFF
##1C4580	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274B82

Deuteranopia (green-blind)

#12417F

Tritanopia (blue-blind)

#00535C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1c4580;
/* rgb */ color: rgb(28, 69, 128);
/* oklch */ color: oklch(39.5% 0.110 257.9);

Tailwind

colors: {
  custom: {
    50: '#6878a5',
    500: '#1c4580',
    950: '#000000',
  },
}

SCSS

$custom: #1c4580;
$custom-light: #6878a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4580",
  "rgb": {
    "r": 28,
    "g": 69,
    "b": 128
  },
  "hsl": {
    "h": 215.4,
    "s": 64.103,
    "l": 30.588
  },
  "oklch": {
    "l": 0.39517,
    "c": 0.10969,
    "h": 257.9
  },
  "luminance": 0.06062
}

Semantic roles & 50–950 ramp

primary

#1C4580

secondary

#B38644

accent

#A341E7

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1C4580

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

Preview Lab → · Contrast checker → · Palette generator →