#1D4FB3#1D4FB3

#1D4FB3 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.8% C 0.168 H 262.1°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#1D4FB3
RGB	rgb(29, 79, 179)
HSL	hsl(220, 72%, 41%)
HSV	hsv(220, 84%, 70%)
CMYK	cmyk(83.8%, 55.9%, 0%, 29.8%)
CIE-LAB	lab(36.19, 21.89, -57.65)
CIE-LCH	lch(36.19, 61.67, 290.79°)
OKLab	oklab(45.76% -0.023 -0.1665)
OKLCH	oklch(45.76% 0.168 262.1)
XYZ	xyz(11.4364, 9.1064, 43.7940)
Luminance	0.0911 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4FB3 #B3811D

analogous

#1D9AB3 #1D4FB3 #361DB3

triadic

#1D4FB3 #B31D4F #4FB31D

tetradic

#1D4FB3 #B31D9A #B3811D #1DB336

square

#1D4FB3 #B31D9A #B3811D #1DB336

split-complementary

#1D4FB3 #B3361D #9AB31D

monochromatic

#0C214A #14387E #1D4FB3 #306ADD #6490E6

Accessibility & contrast

On white

7.44

#1D4FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#1D4FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4FB3

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4FB3	#FFFFFF	#000000	##FFFFFF
##1D4FB3	1.00	7.44	2.82	7.44
#FFFFFF	7.44	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.44	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: #1d4fb3;
/* rgb */ color: rgb(29, 79, 179);
/* oklch */ color: oklch(45.8% 0.168 262.1);

Tailwind

colors: {
  custom: {
    50: '#747fca',
    500: '#1d4fb3',
    950: '#000000',
  },
}

SCSS

$custom: #1d4fb3;
$custom-light: #747fca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4fb3",
  "rgb": {
    "r": 29,
    "g": 79,
    "b": 179
  },
  "hsl": {
    "h": 220,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.45756,
    "c": 0.1681,
    "h": 262.1
  },
  "luminance": 0.09108
}

Semantic roles & 50–950 ramp

primary

#1D4FB3

secondary

#CBA861

accent

#B239EF

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1D4FB3

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

Preview Lab → · Contrast checker → · Palette generator →