#1D4E8B#1D4E8B

#1D4E8B is a dark, moderate cyan. Relative luminance 0.076; OKLCH L 42.5% C 0.114 H 255.7°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#1D4E8B
RGB	rgb(29, 78, 139)
HSL	hsl(213, 65%, 33%)
HSV	hsv(213, 79%, 55%)
CMYK	cmyk(79.1%, 43.9%, 0%, 45.5%)
CIE-LAB	lab(33.08, 6.57, -38.61)
CIE-LCH	lch(33.08, 39.16, 279.66°)
OKLab	oklab(42.48% -0.0281 -0.1105)
OKLCH	oklch(42.48% 0.114 255.7)
XYZ	xyz(7.8896, 7.5731, 25.4670)
Luminance	0.0757 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4E8B #8B5A1D

analogous

#1D858B #1D4E8B #231D8B

triadic

#1D4E8B #8B1D4E #4E8B1D

tetradic

#1D4E8B #8B1D85 #8B5A1D #1D8B23

square

#1D4E8B #8B1D85 #8B5A1D #1D8B23

split-complementary

#1D4E8B #8B231D #858B1D

monochromatic

#081526 #123258 #1D4E8B #286ABE #4989D9

Accessibility & contrast

On white

8.35

#1D4E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1D4E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4E8B

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4E8B	#FFFFFF	#000000	##FFFFFF
##1D4E8B	1.00	8.35	2.51	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#30538D

Deuteranopia (green-blind)

#1B498A

Tritanopia (blue-blind)

#005C65

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1d4e8b;
/* rgb */ color: rgb(29, 78, 139);
/* oklch */ color: oklch(42.5% 0.114 255.7);

Tailwind

colors: {
  custom: {
    50: '#6a7fad',
    500: '#1d4e8b',
    950: '#000000',
  },
}

SCSS

$custom: #1d4e8b;
$custom-light: #6a7fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4e8b",
  "rgb": {
    "r": 29,
    "g": 78,
    "b": 139
  },
  "hsl": {
    "h": 213.273,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.42476,
    "c": 0.11405,
    "h": 255.7
  },
  "luminance": 0.07574
}

Semantic roles & 50–950 ramp

primary

#1D4E8B

secondary

#BB8849

accent

#9D3FE8

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1D4E8B

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

Preview Lab → · Contrast checker → · Palette generator →