#1C4FB3#1C4FB3

#1C4FB3 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.7% C 0.168 H 261.9°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#1C4FB3
RGB	rgb(28, 79, 179)
HSL	hsl(220, 73%, 41%)
HSV	hsv(220, 84%, 70%)
CMYK	cmyk(84.4%, 55.9%, 0%, 29.8%)
CIE-LAB	lab(36.16, 21.81, -57.70)
CIE-LCH	lch(36.16, 61.68, 290.71°)
OKLab	oklab(45.73% -0.0236 -0.1667)
OKLCH	oklch(45.73% 0.168 261.9)
XYZ	xyz(11.4086, 9.0921, 43.7927)
Luminance	0.0909 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4FB3 #B3801C

analogous

#1C9AB3 #1C4FB3 #341CB3

triadic

#1C4FB3 #B31C4F #4FB31C

tetradic

#1C4FB3 #B31C9A #B3801C #1CB334

square

#1C4FB3 #B31C9A #B3801C #1CB334

split-complementary

#1C4FB3 #B3341C #9AB31C

monochromatic

#0B2049 #14387E #1C4FB3 #2E69DE #638FE7

Accessibility & contrast

On white

7.45

#1C4FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#1C4FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4FB3

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4FB3	#FFFFFF	#000000	##FFFFFF
##1C4FB3	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB6

Deuteranopia (green-blind)

#004FB1

Tritanopia (blue-blind)

#006879

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1c4fb3;
/* rgb */ color: rgb(28, 79, 179);
/* oklch */ color: oklch(45.7% 0.168 261.9);

Tailwind

colors: {
  custom: {
    50: '#747fca',
    500: '#1c4fb3',
    950: '#000000',
  },
}

SCSS

$custom: #1c4fb3;
$custom-light: #747fca;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4fb3",
  "rgb": {
    "r": 28,
    "g": 79,
    "b": 179
  },
  "hsl": {
    "h": 219.735,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.45728,
    "c": 0.16832,
    "h": 261.9
  },
  "luminance": 0.09094
}

Semantic roles & 50–950 ramp

primary

#1C4FB3

secondary

#CBA75F

accent

#B238F0

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1C4FB3

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

Preview Lab → · Contrast checker → · Palette generator →