#1F55AD#1F55AD

#1F55AD is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.6% C 0.152 H 259.9°. Best body text is #FFFFFF at 7.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F55AD
RGB	rgb(31, 85, 173)
HSL	hsl(217, 70%, 40%)
HSV	hsv(217, 82%, 68%)
CMYK	cmyk(82.1%, 50.9%, 0%, 32.2%)
CIE-LAB	lab(37.49, 15.69, -51.99)
CIE-LCH	lch(37.49, 54.31, 286.79°)
OKLab	oklab(46.62% -0.0267 -0.1497)
OKLCH	oklch(46.62% 0.152 259.9)
XYZ	xyz(11.3536, 9.8041, 40.8210)
Luminance	0.0980 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F55AD #AD771F

analogous

#1F9CAD #1F55AD #301FAD

triadic

#1F55AD #AD1F55 #55AD1F

tetradic

#1F55AD #AD1F9C #AD771F #1FAD30

square

#1F55AD #AD1F9C #AD771F #1FAD30

split-complementary

#1F55AD #AD301F #9CAD1F

monochromatic

#0C2245 #163C79 #1F55AD #2F70DA #6394E3

Accessibility & contrast

On white

7.09

#1F55AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#1F55AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F55AD

7.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F55AD	#FFFFFF	#000000	##FFFFFF
##1F55AD	1.00	7.09	2.96	7.09
#FFFFFF	7.09	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D5FB0

Deuteranopia (green-blind)

#0052AB

Tritanopia (blue-blind)

#006A79

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #1f55ad;
/* rgb */ color: rgb(31, 85, 173);
/* oklch */ color: oklch(46.6% 0.152 259.9);

Tailwind

colors: {
  custom: {
    50: '#7384c6',
    500: '#1f55ad',
    950: '#000000',
  },
}

SCSS

$custom: #1f55ad;
$custom-light: #7384c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f55ad",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 173
  },
  "hsl": {
    "h": 217.183,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.46621,
    "c": 0.15208,
    "h": 259.9
  },
  "luminance": 0.09805
}

Semantic roles & 50–950 ramp

primary

#1F55AD

secondary

#C8A060

accent

#A93BEC

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1F55AD

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

Preview Lab → · Contrast checker → · Palette generator →