#1F5ABB#1F5ABB

#1F5ABB is a mid, vivid blue. Relative luminance 0.112; OKLCH L 48.8% C 0.165 H 260.1°. Best body text is #FFFFFF at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F5ABB
RGB	rgb(31, 90, 187)
HSL	hsl(217, 72%, 43%)
HSV	hsv(217, 83%, 73%)
CMYK	cmyk(83.4%, 51.9%, 0%, 26.7%)
CIE-LAB	lab(39.90, 17.91, -56.33)
CIE-LCH	lch(39.90, 59.11, 287.63°)
OKLab	oklab(48.78% -0.0284 -0.1624)
OKLCH	oklch(48.78% 0.165 260.1)
XYZ	xyz(13.1876, 11.1899, 48.4689)
Luminance	0.1119 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5ABB #BB801F

analogous

#1FA8BB #1F5ABB #321FBB

triadic

#1F5ABB #BB1F5A #5ABB1F

tetradic

#1F5ABB #BB1FA8 #BB801F #1FBB32

square

#1F5ABB #BB1FA8 #BB801F #1FBB32

split-complementary

#1F5ABB #BB321F #A8BB1F

monochromatic

#0E2752 #164187 #1F5ABB #3977DE #6E9BE7

Accessibility & contrast

On white

6.49

#1F5ABB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#1F5ABB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5ABB

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5ABB	#FFFFFF	#000000	##FFFFFF
##1F5ABB	1.00	6.49	3.24	6.49
#FFFFFF	6.49	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1665BE

Deuteranopia (green-blind)

#0057B9

Tritanopia (blue-blind)

#007282

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #1f5abb;
/* rgb */ color: rgb(31, 90, 187);
/* oklch */ color: oklch(48.8% 0.165 260.1);

Tailwind

colors: {
  custom: {
    50: '#7687d0',
    500: '#1f5abb',
    950: '#000000',
  },
}

SCSS

$custom: #1f5abb;
$custom-light: #7687d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5abb",
  "rgb": {
    "r": 31,
    "g": 90,
    "b": 187
  },
  "hsl": {
    "h": 217.308,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.48779,
    "c": 0.16486,
    "h": 260.1
  },
  "luminance": 0.11191
}

Semantic roles & 50–950 ramp

primary

#1F5ABB

secondary

#CDA769

accent

#AA3AEE

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #1F5ABB

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

Preview Lab → · Contrast checker → · Palette generator →