#1D4B8F#1D4B8F

#1D4B8F is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.1% C 0.123 H 258.5°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#1D4B8F
RGB	rgb(29, 75, 143)
HSL	hsl(216, 66%, 34%)
HSV	hsv(216, 80%, 56%)
CMYK	cmyk(79.7%, 47.6%, 0%, 43.9%)
CIE-LAB	lab(32.43, 10.20, -42.10)
CIE-LCH	lch(32.43, 43.32, 283.61°)
OKLab	oklab(42.06% -0.0247 -0.1208)
OKLCH	oklch(42.06% 0.123 258.5)
XYZ	xyz(7.9789, 7.2756, 26.9651)
Luminance	0.0728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4B8F #8F611D

analogous

#1D848F #1D4B8F #281D8F

triadic

#1D4B8F #8F1D4B #4B8F1D

tetradic

#1D4B8F #8F1D84 #8F611D #1D8F28

square

#1D4B8F #8F1D84 #8F611D #1D8F28

split-complementary

#1D4B8F #8F281D #848F1D

monochromatic

#081629 #13305C #1D4B8F #2766C2 #4C85DB

Accessibility & contrast

On white

8.55

#1D4B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1D4B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4B8F

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4B8F	#FFFFFF	#000000	##FFFFFF
##1D4B8F	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#265292

Deuteranopia (green-blind)

#08478E

Tritanopia (blue-blind)

#005B66

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1d4b8f;
/* rgb */ color: rgb(29, 75, 143);
/* oklch */ color: oklch(42.1% 0.123 258.5);

Tailwind

colors: {
  custom: {
    50: '#6b7cb0',
    500: '#1d4b8f',
    950: '#000000',
  },
}

SCSS

$custom: #1d4b8f;
$custom-light: #6b7cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4b8f",
  "rgb": {
    "r": 29,
    "g": 75,
    "b": 143
  },
  "hsl": {
    "h": 215.789,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.42056,
    "c": 0.12334,
    "h": 258.5
  },
  "luminance": 0.07277
}

Semantic roles & 50–950 ramp

primary

#1D4B8F

secondary

#BD8F4B

accent

#A43FE9

background

#F6F7FA

surface

#ECEEF5

border

#C7C9CF

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1D4B8F

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

Preview Lab → · Contrast checker → · Palette generator →