#1C3F74#1C3F74

#1C3F74 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.2% C 0.100 H 258.6°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F74
RGB	rgb(28, 63, 116)
HSL	hsl(216, 61%, 28%)
HSV	hsv(216, 76%, 45%)
CMYK	cmyk(75.9%, 45.7%, 0%, 54.5%)
CIE-LAB	lab(26.91, 7.34, -34.15)
CIE-LCH	lch(26.91, 34.93, 282.13°)
OKLab	oklab(37.21% -0.0197 -0.0977)
OKLCH	oklch(37.21% 0.1 258.6)
XYZ	xyz(5.4076, 5.0623, 17.2117)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F74 #74511C

analogous

#1C6B74 #1C3F74 #251C74

triadic

#1C3F74 #741C3F #3F741C

tetradic

#1C3F74 #741C6B #74511C #1C7425

square

#1C3F74 #741C6B #74511C #1C7425

split-complementary

#1C3F74 #74251C #6B741C

monochromatic

#060D19 #102443 #1C3F74 #285AA5 #3B76D0

Accessibility & contrast

On white

10.43

#1C3F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1C3F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F74

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F74	#FFFFFF	#000000	##FFFFFF
##1C3F74	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254476

Deuteranopia (green-blind)

#143C73

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1c3f74;
/* rgb */ color: rgb(28, 63, 116);
/* oklch */ color: oklch(37.2% 0.100 258.6);

Tailwind

colors: {
  custom: {
    50: '#65739c',
    500: '#1c3f74',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f74;
$custom-light: #65739c;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f74",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 116
  },
  "hsl": {
    "h": 216.136,
    "s": 61.111,
    "l": 28.235
  },
  "oklch": {
    "l": 0.3721,
    "c": 0.09968,
    "h": 258.6
  },
  "luminance": 0.05063
}

Semantic roles & 50–950 ramp

primary

#1C3F74

secondary

#A88043

accent

#A444E4

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1C3F74

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

Preview Lab → · Contrast checker → · Palette generator →