#1F55A6#1F55A6

#1F55A6 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.1% C 0.142 H 258.8°. Best body text is #FFFFFF at 7.22:1 contrast (WCAG AA passes).

Color values

HEX	#1F55A6
RGB	rgb(31, 85, 166)
HSL	hsl(216, 69%, 39%)
HSV	hsv(216, 81%, 65%)
CMYK	cmyk(81.3%, 48.8%, 0%, 34.9%)
CIE-LAB	lab(37.00, 12.91, -48.61)
CIE-LCH	lch(37.00, 50.30, 284.88°)
OKLab	oklab(46.1% -0.0277 -0.1398)
OKLCH	oklch(46.1% 0.142 258.8)
XYZ	xyz(10.6940, 9.5402, 37.3468)
Luminance	0.0954 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F55A6 #A6701F

analogous

#1F98A6 #1F55A6 #2C1FA6

triadic

#1F55A6 #A61F55 #55A61F

tetradic

#1F55A6 #A61F98 #A6701F #1FA62C

square

#1F55A6 #A61F98 #A6701F #1FA62C

split-complementary

#1F55A6 #A62C1F #98A61F

monochromatic

#0C203F #153B72 #1F55A6 #2B70D7 #5E93E1

Accessibility & contrast

On white

7.22

#1F55A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#1F55A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F55A6

7.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F55A6	#FFFFFF	#000000	##FFFFFF
##1F55A6	1.00	7.22	2.91	7.22
#FFFFFF	7.22	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#265EA9

Deuteranopia (green-blind)

#0051A4

Tritanopia (blue-blind)

#006875

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1f55a6;
/* rgb */ color: rgb(31, 85, 166);
/* oklch */ color: oklch(46.1% 0.142 258.8);

Tailwind

colors: {
  custom: {
    50: '#7184c1',
    500: '#1f55a6',
    950: '#000000',
  },
}

SCSS

$custom: #1f55a6;
$custom-light: #7184c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f55a6",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 166
  },
  "hsl": {
    "h": 216,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.46095,
    "c": 0.14249,
    "h": 258.8
  },
  "luminance": 0.09541
}

Semantic roles & 50–950 ramp

primary

#1F55A6

secondary

#C59B5B

accent

#A53CEB

background

#F7F8FB

surface

#EDEFF7

border

#C8CAD0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F55A6

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

Preview Lab → · Contrast checker → · Palette generator →