#1D538B#1D538B

#1D538B is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.7% C 0.108 H 252.4°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#1D538B
RGB	rgb(29, 83, 139)
HSL	hsl(211, 65%, 33%)
HSV	hsv(211, 79%, 55%)
CMYK	cmyk(79.1%, 40.3%, 0%, 45.5%)
CIE-LAB	lab(34.62, 3.26, -36.14)
CIE-LCH	lch(34.62, 36.29, 275.15°)
OKLab	oklab(43.68% -0.0327 -0.1032)
OKLCH	oklch(43.68% 0.108 252.4)
XYZ	xyz(8.2584, 8.3108, 25.5900)
Luminance	0.0831 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D538B #8B551D

analogous

#1D8A8B #1D538B #1E1D8B

triadic

#1D538B #8B1D53 #538B1D

tetradic

#1D538B #8B1D8A #8B551D #1D8B1E

square

#1D538B #8B1D8A #8B551D #1D8B1E

split-complementary

#1D538B #8B1E1D #8A8B1D

monochromatic

#081726 #123558 #1D538B #2871BE #4990D9

Accessibility & contrast

On white

7.89

#1D538B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#1D538B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D538B

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D538B	#FFFFFF	#000000	##FFFFFF
##1D538B	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#38578D

Deuteranopia (green-blind)

#274D8A

Tritanopia (blue-blind)

#006068

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1d538b;
/* rgb */ color: rgb(29, 83, 139);
/* oklch */ color: oklch(43.7% 0.108 252.4);

Tailwind

colors: {
  custom: {
    50: '#6a82ad',
    500: '#1d538b',
    950: '#000000',
  },
}

SCSS

$custom: #1d538b;
$custom-light: #6a82ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d538b",
  "rgb": {
    "r": 29,
    "g": 83,
    "b": 139
  },
  "hsl": {
    "h": 210.545,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.43678,
    "c": 0.10825,
    "h": 252.4
  },
  "luminance": 0.08312
}

Semantic roles & 50–950 ramp

primary

#1D538B

secondary

#BB8349

accent

#953FE8

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1D538B

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

Preview Lab → · Contrast checker → · Palette generator →