#1F539B#1F539B

#1F539B is a dark, vivid cyan. Relative luminance 0.088; OKLCH L 44.8% C 0.130 H 257.5°. Best body text is #FFFFFF at 7.58:1 contrast (WCAG AA passes).

Color values

HEX	#1F539B
RGB	rgb(31, 83, 155)
HSL	hsl(215, 67%, 36%)
HSV	hsv(215, 80%, 61%)
CMYK	cmyk(80%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(35.68, 9.87, -44.15)
CIE-LCH	lch(35.68, 45.24, 282.60°)
OKLab	oklab(44.84% -0.028 -0.1267)
OKLCH	oklch(44.84% 0.13 257.5)
XYZ	xyz(9.5725, 8.8432, 32.2064)
Luminance	0.0884 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F539B #9B671F

analogous

#1F919B #1F539B #291F9B

triadic

#1F539B #9B1F53 #539B1F

tetradic

#1F539B #9B1F91 #9B671F #1F9B29

square

#1F539B #9B1F91 #9B671F #1F9B29

split-complementary

#1F539B #9B291F #919B1F

monochromatic

#0B1C35 #153868 #1F539B #296ECE #578FDD

Accessibility & contrast

On white

7.58

#1F539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#1F539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F539B

7.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F539B	#FFFFFF	#000000	##FFFFFF
##1F539B	1.00	7.58	2.77	7.58
#FFFFFF	7.58	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D5A9E

Deuteranopia (green-blind)

#0F4F9A

Tritanopia (blue-blind)

#00646F

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f539b;
/* rgb */ color: rgb(31, 83, 155);
/* oklch */ color: oklch(44.8% 0.130 257.5);

Tailwind

colors: {
  custom: {
    50: '#6f82b9',
    500: '#1f539b',
    950: '#000000',
  },
}

SCSS

$custom: #1f539b;
$custom-light: #6f82b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f539b",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 214.839,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.4484,
    "c": 0.12975,
    "h": 257.5
  },
  "luminance": 0.08844
}

Semantic roles & 50–950 ramp

primary

#1F539B

secondary

#C19455

accent

#A23EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F539B

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

Preview Lab → · Contrast checker → · Palette generator →