#1F55A8#1F55A8

#1F55A8 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.2% C 0.145 H 259.1°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#1F55A8
RGB	rgb(31, 85, 168)
HSL	hsl(216, 69%, 39%)
HSV	hsv(216, 82%, 66%)
CMYK	cmyk(81.5%, 49.4%, 0%, 34.1%)
CIE-LAB	lab(37.14, 13.71, -49.58)
CIE-LCH	lch(37.14, 51.44, 285.46°)
OKLab	oklab(46.24% -0.0274 -0.1426)
OKLCH	oklch(46.24% 0.145 259.1)
XYZ	xyz(10.8789, 9.6141, 38.3205)
Luminance	0.0961 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F55A8 #A8721F

analogous

#1F9AA8 #1F55A8 #2D1FA8

triadic

#1F55A8 #A81F55 #55A81F

tetradic

#1F55A8 #A81F9A #A8721F #1FA82D

square

#1F55A8 #A81F9A #A8721F #1FA82D

split-complementary

#1F55A8 #A82D1F #9AA81F

monochromatic

#0C2141 #153B74 #1F55A8 #2C70D8 #6093E2

Accessibility & contrast

On white

7.18

#1F55A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#1F55A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F55A8

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F55A8	#FFFFFF	#000000	##FFFFFF
##1F55A8	1.00	7.18	2.92	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#245EAB

Deuteranopia (green-blind)

#0052A6

Tritanopia (blue-blind)

#006976

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1f55a8;
/* rgb */ color: rgb(31, 85, 168);
/* oklch */ color: oklch(46.2% 0.145 259.1);

Tailwind

colors: {
  custom: {
    50: '#7284c2',
    500: '#1f55a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f55a8;
$custom-light: #7284c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f55a8",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 168
  },
  "hsl": {
    "h": 216.35,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.46244,
    "c": 0.14524,
    "h": 259.1
  },
  "luminance": 0.09615
}

Semantic roles & 50–950 ramp

primary

#1F55A8

secondary

#C69D5D

accent

#A63CEC

background

#F7F8FC

surface

#EDEFF8

border

#C8CAD1

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F55A8

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

Preview Lab → · Contrast checker → · Palette generator →