#1D437B#1D437B

#1D437B is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.7% C 0.105 H 258.2°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#1D437B
RGB	rgb(29, 67, 123)
HSL	hsl(216, 62%, 30%)
HSV	hsv(216, 76%, 48%)
CMYK	cmyk(76.4%, 45.5%, 0%, 51.8%)
CIE-LAB	lab(28.66, 7.57, -35.77)
CIE-LCH	lch(28.66, 36.56, 281.95°)
OKLab	oklab(38.72% -0.0213 -0.1024)
OKLCH	oklch(38.72% 0.105 258.2)
XYZ	xyz(6.0877, 5.7049, 19.5154)
Luminance	0.0571 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D437B #7B551D

analogous

#1D727B #1D437B #261D7B

triadic

#1D437B #7B1D43 #437B1D

tetradic

#1D437B #7B1D72 #7B551D #1D7B26

square

#1D437B #7B1D72 #7B551D #1D7B26

split-complementary

#1D437B #7B261D #727B1D

monochromatic

#060D19 #112849 #1D437B #295EAD #407BD2

Accessibility & contrast

On white

9.81

#1D437B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1D437B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D437B

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D437B	#FFFFFF	#000000	##FFFFFF
##1D437B	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27487D

Deuteranopia (green-blind)

#15407A

Tritanopia (blue-blind)

#005059

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1d437b;
/* rgb */ color: rgb(29, 67, 123);
/* oklch */ color: oklch(38.7% 0.105 258.2);

Tailwind

colors: {
  custom: {
    50: '#6776a1',
    500: '#1d437b',
    950: '#000000',
  },
}

SCSS

$custom: #1d437b;
$custom-light: #6776a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d437b",
  "rgb": {
    "r": 29,
    "g": 67,
    "b": 123
  },
  "hsl": {
    "h": 215.745,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.38718,
    "c": 0.10459,
    "h": 258.2
  },
  "luminance": 0.05706
}

Semantic roles & 50–950 ramp

primary

#1D437B

secondary

#AF8445

accent

#A343E5

background

#F6F7FA

surface

#EBEDF3

border

#C6C8CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D437B

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

Preview Lab → · Contrast checker → · Palette generator →