#1D558F#1D558F

#1D558F is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.4% C 0.111 H 252.5°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#1D558F
RGB	rgb(29, 85, 143)
HSL	hsl(211, 66%, 34%)
HSV	hsv(211, 80%, 56%)
CMYK	cmyk(79.7%, 40.6%, 0%, 43.9%)
CIE-LAB	lab(35.48, 3.54, -37.22)
CIE-LCH	lch(35.48, 37.38, 275.43°)
OKLab	oklab(44.43% -0.0336 -0.1063)
OKLCH	oklch(44.43% 0.111 252.5)
XYZ	xyz(8.7113, 8.7403, 27.2092)
Luminance	0.0874 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D558F #8F571D

analogous

#1D8E8F #1D558F #1E1D8F

triadic

#1D558F #8F1D55 #558F1D

tetradic

#1D558F #8F1D8E #8F571D #1D8F1E

square

#1D558F #8F1D8E #8F571D #1D8F1E

split-complementary

#1D558F #8F1E1D #8E8F1D

monochromatic

#081929 #13375C #1D558F #2773C2 #4C92DB

Accessibility & contrast

On white

7.64

#1D558F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#1D558F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D558F

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D558F	#FFFFFF	#000000	##FFFFFF
##1D558F	1.00	7.64	2.75	7.64
#FFFFFF	7.64	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#395991

Deuteranopia (green-blind)

#274F8E

Tritanopia (blue-blind)

#00636B

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1d558f;
/* rgb */ color: rgb(29, 85, 143);
/* oklch */ color: oklch(44.4% 0.111 252.5);

Tailwind

colors: {
  custom: {
    50: '#6b84b0',
    500: '#1d558f',
    950: '#000000',
  },
}

SCSS

$custom: #1d558f;
$custom-light: #6b84b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d558f",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 143
  },
  "hsl": {
    "h": 210.526,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.44425,
    "c": 0.11147,
    "h": 252.5
  },
  "luminance": 0.08741
}

Semantic roles & 50–950 ramp

primary

#1D558F

secondary

#BD854B

accent

#953FE9

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1D558F

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

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