#1D5B9F#1D5B9F

#1D5B9F is a mid, vivid cyan. Relative luminance 0.102; OKLCH L 46.9% C 0.126 H 253.9°. Best body text is #FFFFFF at 6.89:1 contrast (WCAG AA passes).

Color values

HEX	#1D5B9F
RGB	rgb(29, 91, 159)
HSL	hsl(211, 69%, 37%)
HSV	hsv(211, 82%, 62%)
CMYK	cmyk(81.8%, 42.8%, 0%, 37.6%)
CIE-LAB	lab(38.28, 5.98, -42.39)
CIE-LCH	lch(38.28, 42.81, 278.03°)
OKLab	oklab(46.92% -0.0351 -0.1214)
OKLCH	oklch(46.92% 0.126 253.9)
XYZ	xyz(10.5034, 10.2453, 34.2181)
Luminance	0.1025 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D5B9F #9F611D

analogous

#1D9C9F #1D5B9F #201D9F

triadic

#1D5B9F #9F1D5B #5B9F1D

tetradic

#1D5B9F #9F1D9C #9F611D #1D9F20

square

#1D5B9F #9F1D9C #9F611D #1D9F20

split-complementary

#1D5B9F #9F201D #9C9F1D

monochromatic

#0A2037 #143D6B #1D5B9F #2679D3 #5698E0

Accessibility & contrast

On white

6.89

#1D5B9F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#1D5B9F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D5B9F

6.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D5B9F	#FFFFFF	#000000	##FFFFFF
##1D5B9F	1.00	6.89	3.05	6.89
#FFFFFF	6.89	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3960A2

Deuteranopia (green-blind)

#21559E

Tritanopia (blue-blind)

#006B75

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #1d5b9f;
/* rgb */ color: rgb(29, 91, 159);
/* oklch */ color: oklch(46.9% 0.126 253.9);

Tailwind

colors: {
  custom: {
    50: '#6f88bc',
    500: '#1d5b9f',
    950: '#000000',
  },
}

SCSS

$custom: #1d5b9f;
$custom-light: #6f88bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1d5b9f",
  "rgb": {
    "r": 29,
    "g": 91,
    "b": 159
  },
  "hsl": {
    "h": 211.385,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.46921,
    "c": 0.12634,
    "h": 253.9
  },
  "luminance": 0.10247
}

Semantic roles & 50–950 ramp

primary

#1D5B9F

secondary

#C48E54

accent

#983CEC

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #1D5B9F

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

Preview Lab → · Contrast checker → · Palette generator →