#1F55A9#1F55A9

#1F55A9 is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.3% C 0.147 H 259.3°. Best body text is #FFFFFF at 7.17:1 contrast (WCAG AA passes).

Color values

HEX	#1F55A9
RGB	rgb(31, 85, 169)
HSL	hsl(217, 69%, 39%)
HSV	hsv(217, 82%, 66%)
CMYK	cmyk(81.7%, 49.7%, 0%, 33.7%)
CIE-LAB	lab(37.21, 14.11, -50.07)
CIE-LCH	lch(37.21, 52.02, 285.73°)
OKLab	oklab(46.32% -0.0272 -0.1441)
OKLCH	oklch(46.32% 0.147 259.3)
XYZ	xyz(10.9724, 9.6516, 38.8131)
Luminance	0.0965 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F55A9 #A9731F

analogous

#1F9AA9 #1F55A9 #2E1FA9

triadic

#1F55A9 #A91F55 #55A91F

tetradic

#1F55A9 #A91F9A #A9731F #1FA92E

square

#1F55A9 #A91F9A #A9731F #1FA92E

split-complementary

#1F55A9 #A92E1F #9AA91F

monochromatic

#0C2142 #163B75 #1F55A9 #2D70D8 #6093E2

Accessibility & contrast

On white

7.17

#1F55A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#1F55A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F55A9

7.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F55A9	#FFFFFF	#000000	##FFFFFF
##1F55A9	1.00	7.17	2.93	7.17
#FFFFFF	7.17	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#235EAC

Deuteranopia (green-blind)

#0052A7

Tritanopia (blue-blind)

#006977

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #1f55a9;
/* rgb */ color: rgb(31, 85, 169);
/* oklch */ color: oklch(46.3% 0.147 259.3);

Tailwind

colors: {
  custom: {
    50: '#7284c3',
    500: '#1f55a9',
    950: '#000000',
  },
}

SCSS

$custom: #1f55a9;
$custom-light: #7284c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f55a9",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 169
  },
  "hsl": {
    "h": 216.522,
    "s": 69,
    "l": 39.216
  },
  "oklch": {
    "l": 0.46319,
    "c": 0.14661,
    "h": 259.3
  },
  "luminance": 0.09653
}

Semantic roles & 50–950 ramp

primary

#1F55A9

secondary

#C79D5D

accent

#A73CEC

background

#F7F8FC

surface

#EDEFF8

border

#C8CAD1

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F55A9

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

Preview Lab → · Contrast checker → · Palette generator →