#1F5CBB#1F5CBB

#1F5CBB is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.2% C 0.162 H 259.4°. Best body text is #FFFFFF at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#1F5CBB
RGB	rgb(31, 92, 187)
HSL	hsl(217, 72%, 43%)
HSV	hsv(217, 83%, 73%)
CMYK	cmyk(83.4%, 50.8%, 0%, 26.7%)
CIE-LAB	lab(40.46, 16.59, -55.42)
CIE-LCH	lch(40.46, 57.85, 286.67°)
OKLab	oklab(49.21% -0.0298 -0.1597)
OKLCH	oklch(49.21% 0.162 259.4)
XYZ	xyz(13.3586, 11.5318, 48.5259)
Luminance	0.1153 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5CBB #BB7E1F

analogous

#1FAABB #1F5CBB #301FBB

triadic

#1F5CBB #BB1F5C #5CBB1F

tetradic

#1F5CBB #BB1FAA #BB7E1F #1FBB30

square

#1F5CBB #BB1FAA #BB7E1F #1FBB30

split-complementary

#1F5CBB #BB301F #AABB1F

monochromatic

#0E2852 #164287 #1F5CBB #397ADE #6E9DE7

Accessibility & contrast

On white

6.35

#1F5CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#1F5CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5CBB

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5CBB	#FFFFFF	#000000	##FFFFFF
##1F5CBB	1.00	6.35	3.31	6.35
#FFFFFF	6.35	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E67BE

Deuteranopia (green-blind)

#0059B9

Tritanopia (blue-blind)

#007382

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #1f5cbb;
/* rgb */ color: rgb(31, 92, 187);
/* oklch */ color: oklch(49.2% 0.162 259.4);

Tailwind

colors: {
  custom: {
    50: '#7689d0',
    500: '#1f5cbb',
    950: '#000000',
  },
}

SCSS

$custom: #1f5cbb;
$custom-light: #7689d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5cbb",
  "rgb": {
    "r": 31,
    "g": 92,
    "b": 187
  },
  "hsl": {
    "h": 216.538,
    "s": 71.56,
    "l": 42.745
  },
  "oklch": {
    "l": 0.4921,
    "c": 0.16242,
    "h": 259.4
  },
  "luminance": 0.11533
}

Semantic roles & 50–950 ramp

primary

#1F5CBB

secondary

#CDA669

accent

#A83AEE

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0B14

muted

#7C7C82

Preview Lab

Preview with #1F5CBB

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

Preview Lab → · Contrast checker → · Palette generator →