#1F59B0#1F59B0

#1F59B0 is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.7% C 0.151 H 258.9°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#1F59B0
RGB	rgb(31, 89, 176)
HSL	hsl(216, 70%, 41%)
HSV	hsv(216, 82%, 69%)
CMYK	cmyk(82.4%, 49.4%, 0%, 31%)
CIE-LAB	lab(38.85, 14.23, -51.57)
CIE-LCH	lch(38.85, 53.50, 285.42°)
OKLab	oklab(47.73% -0.0292 -0.1484)
OKLCH	oklch(47.73% 0.151 258.9)
XYZ	xyz(11.9711, 10.5692, 42.4750)
Luminance	0.1057 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F59B0 #B0761F

analogous

#1FA1B0 #1F59B0 #2D1FB0

triadic

#1F59B0 #B01F59 #59B01F

tetradic

#1F59B0 #B01FA1 #B0761F #1FB02D

square

#1F59B0 #B01FA1 #B0761F #1FB02D

split-complementary

#1F59B0 #B02D1F #A1B01F

monochromatic

#0D2448 #163F7C #1F59B0 #3175DB #6598E4

Accessibility & contrast

On white

6.74

#1F59B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#1F59B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F59B0

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F59B0	#FFFFFF	#000000	##FFFFFF
##1F59B0	1.00	6.74	3.11	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2562B3

Deuteranopia (green-blind)

#0055AE

Tritanopia (blue-blind)

#006E7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1f59b0;
/* rgb */ color: rgb(31, 89, 176);
/* oklch */ color: oklch(47.7% 0.151 258.9);

Tailwind

colors: {
  custom: {
    50: '#7487c8',
    500: '#1f59b0',
    950: '#000000',
  },
}

SCSS

$custom: #1f59b0;
$custom-light: #7487c8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f59b0",
  "rgb": {
    "r": 31,
    "g": 89,
    "b": 176
  },
  "hsl": {
    "h": 216,
    "s": 70.048,
    "l": 40.588
  },
  "oklch": {
    "l": 0.47728,
    "c": 0.15126,
    "h": 258.9
  },
  "luminance": 0.10571
}

Semantic roles & 50–950 ramp

primary

#1F59B0

secondary

#C9A062

accent

#A63BED

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1F59B0

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

Preview Lab → · Contrast checker → · Palette generator →