#1F5DBB#1F5DBB

#1F5DBB is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.4% C 0.161 H 259.1°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F5DBB
RGB	rgb(31, 93, 187)
HSL	hsl(216, 72%, 43%)
HSV	hsv(216, 83%, 73%)
CMYK	cmyk(83.4%, 50.3%, 0%, 26.7%)
CIE-LAB	lab(40.75, 15.94, -54.96)
CIE-LCH	lch(40.75, 57.23, 286.17°)
OKLab	oklab(49.43% -0.0305 -0.1583)
OKLCH	oklch(49.43% 0.161 259.1)
XYZ	xyz(13.4458, 11.7062, 48.5549)
Luminance	0.1171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5DBB #BB7D1F

analogous

#1FABBB #1F5DBB #2F1FBB

triadic

#1F5DBB #BB1F5D #5DBB1F

tetradic

#1F5DBB #BB1FAB #BB7D1F #1FBB2F

square

#1F5DBB #BB1FAB #BB7D1F #1FBB2F

split-complementary

#1F5DBB #BB2F1F #ABBB1F

monochromatic

#0E2952 #164387 #1F5DBB #397BDE #6E9EE7

Accessibility & contrast

On white

6.28

#1F5DBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#1F5DBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5DBB

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5DBB	#FFFFFF	#000000	##FFFFFF
##1F5DBB	1.00	6.28	3.34	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2167BE

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#007483

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #1f5dbb;
/* rgb */ color: rgb(31, 93, 187);
/* oklch */ color: oklch(49.4% 0.161 259.1);

Tailwind

colors: {
  custom: {
    50: '#768ad0',
    500: '#1f5dbb',
    950: '#000000',
  },
}

SCSS

$custom: #1f5dbb;
$custom-light: #768ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5dbb",
  "rgb": {
    "r": 31,
    "g": 93,
    "b": 187
  },
  "hsl": {
    "h": 216.154,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.49427,
    "c": 0.16121,
    "h": 259.1
  },
  "luminance": 0.11708
}

Semantic roles & 50–950 ramp

primary

#1F5DBB

secondary

#CDA569

accent

#A63AEE

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #1F5DBB

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

Preview Lab → · Contrast checker → · Palette generator →