#1F58BB#1F58BB

#1F58BB is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.4% C 0.167 H 260.7°. Best body text is #FFFFFF at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F58BB
RGB	rgb(31, 88, 187)
HSL	hsl(218, 72%, 43%)
HSV	hsv(218, 83%, 73%)
CMYK	cmyk(83.4%, 52.9%, 0%, 26.7%)
CIE-LAB	lab(39.34, 19.23, -57.24)
CIE-LCH	lch(39.34, 60.38, 288.57°)
OKLab	oklab(48.35% -0.027 -0.1651)
OKLCH	oklch(48.35% 0.167 260.7)
XYZ	xyz(13.0212, 10.8570, 48.4134)
Luminance	0.1086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F58BB #BB821F

analogous

#1FA6BB #1F58BB #341FBB

triadic

#1F58BB #BB1F58 #58BB1F

tetradic

#1F58BB #BB1FA6 #BB821F #1FBB34

square

#1F58BB #BB1FA6 #BB821F #1FBB34

split-complementary

#1F58BB #BB341F #A6BB1F

monochromatic

#0E2752 #163F87 #1F58BB #3975DE #6E9AE7

Accessibility & contrast

On white

6.62

#1F58BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#1F58BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F58BB

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F58BB	#FFFFFF	#000000	##FFFFFF
##1F58BB	1.00	6.62	3.17	6.62
#FFFFFF	6.62	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A64BF

Deuteranopia (green-blind)

#0056B9

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1f58bb;
/* rgb */ color: rgb(31, 88, 187);
/* oklch */ color: oklch(48.4% 0.167 260.7);

Tailwind

colors: {
  custom: {
    50: '#7686d0',
    500: '#1f58bb',
    950: '#000000',
  },
}

SCSS

$custom: #1f58bb;
$custom-light: #7686d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f58bb",
  "rgb": {
    "r": 31,
    "g": 88,
    "b": 187
  },
  "hsl": {
    "h": 218.077,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.48352,
    "c": 0.16729,
    "h": 260.7
  },
  "luminance": 0.10859
}

Semantic roles & 50–950 ramp

primary

#1F58BB

secondary

#CDA869

accent

#AC3AEE

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #1F58BB

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

Preview Lab → · Contrast checker → · Palette generator →