#1F5CB3#1F5CB3

#1F5CB3 is a mid, vivid blue. Relative luminance 0.112; OKLCH L 48.6% C 0.152 H 258.2°. Best body text is #FFFFFF at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F5CB3
RGB	rgb(31, 92, 179)
HSL	hsl(215, 70%, 41%)
HSV	hsv(215, 83%, 70%)
CMYK	cmyk(82.7%, 48.6%, 0%, 29.8%)
CIE-LAB	lab(39.91, 13.44, -51.62)
CIE-LCH	lch(39.91, 53.34, 284.59°)
OKLab	oklab(48.61% -0.031 -0.1485)
OKLCH	oklch(48.61% 0.152 258.2)
XYZ	xyz(12.5259, 11.1987, 44.1405)
Luminance	0.1120 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5CB3 #B3761F

analogous

#1FA6B3 #1F5CB3 #2C1FB3

triadic

#1F5CB3 #B31F5C #5CB31F

tetradic

#1F5CB3 #B31FA6 #B3761F #1FB32C

square

#1F5CB3 #B31FA6 #B3761F #1FB32C

split-complementary

#1F5CB3 #B32C1F #A6B31F

monochromatic

#0D264B #16417F #1F5CB3 #3379DC #689BE5

Accessibility & contrast

On white

6.48

#1F5CB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#1F5CB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5CB3

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5CB3	#FFFFFF	#000000	##FFFFFF
##1F5CB3	1.00	6.48	3.24	6.48
#FFFFFF	6.48	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2965B6

Deuteranopia (green-blind)

#0058B1

Tritanopia (blue-blind)

#00717F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #1f5cb3;
/* rgb */ color: rgb(31, 92, 179);
/* oklch */ color: oklch(48.6% 0.152 258.2);

Tailwind

colors: {
  custom: {
    50: '#7489ca',
    500: '#1f5cb3',
    950: '#000000',
  },
}

SCSS

$custom: #1f5cb3;
$custom-light: #7489ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5cb3",
  "rgb": {
    "r": 31,
    "g": 92,
    "b": 179
  },
  "hsl": {
    "h": 215.27,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.48613,
    "c": 0.15167,
    "h": 258.2
  },
  "luminance": 0.112
}

Semantic roles & 50–950 ramp

primary

#1F5CB3

secondary

#CAA064

accent

#A43BED

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1F5CB3

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

Preview Lab → · Contrast checker → · Palette generator →