#1D3971#1D3971

#1D3971 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.6% C 0.103 H 262.4°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#1D3971
RGB	rgb(29, 57, 113)
HSL	hsl(220, 59%, 28%)
HSV	hsv(220, 74%, 44%)
CMYK	cmyk(74.3%, 49.6%, 0%, 55.7%)
CIE-LAB	lab(24.89, 10.47, -35.49)
CIE-LCH	lch(24.89, 37.00, 286.44°)
OKLab	oklab(35.6% -0.0135 -0.1017)
OKLCH	oklch(35.6% 0.103 262.4)
XYZ	xyz(4.9494, 4.3792, 16.2040)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3971 #71551D

analogous

#1D6371 #1D3971 #2B1D71

triadic

#1D3971 #711D39 #39711D

tetradic

#1D3971 #711D63 #71551D #1D712B

square

#1D3971 #711D63 #71551D #1D712B

split-complementary

#1D3971 #712B1D #63711D

monochromatic

#060C18 #112040 #1D3971 #2952A2 #3C6CCD

Accessibility & contrast

On white

11.19

#1D3971 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1D3971 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3971

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3971	#FFFFFF	#000000	##FFFFFF
##1D3971	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B3F73

Deuteranopia (green-blind)

#073770

Tritanopia (blue-blind)

#00464F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3971;
/* rgb */ color: rgb(29, 57, 113);
/* oklch */ color: oklch(35.6% 0.103 262.4);

Tailwind

colors: {
  custom: {
    50: '#656e9a',
    500: '#1d3971',
    950: '#000000',
  },
}

SCSS

$custom: #1d3971;
$custom-light: #656e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3971",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 113
  },
  "hsl": {
    "h": 220,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.35598,
    "c": 0.10264,
    "h": 262.4
  },
  "luminance": 0.0438
}

Semantic roles & 50–950 ramp

primary

#1D3971

secondary

#A58544

accent

#AE45E2

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1D3971

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

Preview Lab → · Contrast checker → · Palette generator →