#1D3880#1D3880

#1D3880 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.6% C 0.126 H 265.1°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#1D3880
RGB	rgb(29, 56, 128)
HSL	hsl(224, 63%, 31%)
HSV	hsv(224, 77%, 50%)
CMYK	cmyk(77.3%, 56.3%, 0%, 49.8%)
CIE-LAB	lab(25.71, 17.26, -43.66)
CIE-LCH	lch(25.71, 46.95, 291.57°)
OKLab	oklab(36.58% -0.0107 -0.1258)
OKLCH	oklch(36.58% 0.126 265.1)
XYZ	xyz(5.8158, 4.6474, 21.0084)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3880 #80651D

analogous

#1D6980 #1D3880 #331D80

triadic

#1D3880 #801D38 #38801D

tetradic

#1D3880 #801D69 #80651D #1D8033

square

#1D3880 #801D69 #80651D #1D8033

split-complementary

#1D3880 #80331D #69801D

monochromatic

#060C1C #12224E #1D3880 #284EB2 #436BD4

Accessibility & contrast

On white

10.88

#1D3880 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1D3880 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3880

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3880	#FFFFFF	#000000	##FFFFFF
##1D3880	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004283

Deuteranopia (green-blind)

#00397F

Tritanopia (blue-blind)

#004A56

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d3880;
/* rgb */ color: rgb(29, 56, 128);
/* oklch */ color: oklch(36.6% 0.126 265.1);

Tailwind

colors: {
  custom: {
    50: '#696ea5',
    500: '#1d3880',
    950: '#000000',
  },
}

SCSS

$custom: #1d3880;
$custom-light: #696ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3880",
  "rgb": {
    "r": 29,
    "g": 56,
    "b": 128
  },
  "hsl": {
    "h": 223.636,
    "s": 63.057,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36576,
    "c": 0.12627,
    "h": 265.1
  },
  "luminance": 0.04648
}

Semantic roles & 50–950 ramp

primary

#1D3880

secondary

#B39545

accent

#B942E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D3880

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

Preview Lab → · Contrast checker → · Palette generator →