#1F5599#1F5599

#1F5599 is a mid, vivid cyan. Relative luminance 0.091; OKLCH L 45.2% C 0.125 H 256.0°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#1F5599
RGB	rgb(31, 85, 153)
HSL	hsl(213, 66%, 36%)
HSV	hsv(213, 80%, 60%)
CMYK	cmyk(79.7%, 44.4%, 0%, 40%)
CIE-LAB	lab(36.15, 7.75, -42.19)
CIE-LCH	lch(36.15, 42.90, 280.40°)
OKLab	oklab(45.16% -0.0301 -0.1209)
OKLCH	oklch(45.16% 0.125 256)
XYZ	xyz(9.5612, 9.0871, 31.3809)
Luminance	0.0909 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5599 #99631F

analogous

#1F9299 #1F5599 #261F99

triadic

#1F5599 #991F55 #55991F

tetradic

#1F5599 #991F92 #99631F #1F9926

square

#1F5599 #991F92 #99631F #1F9926

split-complementary

#1F5599 #99261F #92991F

monochromatic

#0A1C33 #153966 #1F5599 #2971CC #5691DD

Accessibility & contrast

On white

7.45

#1F5599 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#1F5599 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F5599

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5599	#FFFFFF	#000000	##FFFFFF
##1F5599	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#325B9C

Deuteranopia (green-blind)

#1A5098

Tritanopia (blue-blind)

#00656F

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f5599;
/* rgb */ color: rgb(31, 85, 153);
/* oklch */ color: oklch(45.2% 0.125 256.0);

Tailwind

colors: {
  custom: {
    50: '#6e84b7',
    500: '#1f5599',
    950: '#000000',
  },
}

SCSS

$custom: #1f5599;
$custom-light: #6e84b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5599",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 153
  },
  "hsl": {
    "h": 213.443,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.45163,
    "c": 0.12457,
    "h": 256
  },
  "luminance": 0.09088
}

Semantic roles & 50–950 ramp

primary

#1F5599

secondary

#C09054

accent

#9E3FE9

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F5599

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

Preview Lab → · Contrast checker → · Palette generator →