#1B58B3#1B58B3

#1B58B3 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.6% C 0.157 H 259.0°. Best body text is #FFFFFF at 6.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B58B3
RGB	rgb(27, 88, 179)
HSL	hsl(216, 74%, 40%)
HSV	hsv(216, 85%, 70%)
CMYK	cmyk(84.9%, 50.8%, 0%, 29.8%)
CIE-LAB	lab(38.67, 15.73, -53.64)
CIE-LCH	lch(38.67, 55.90, 286.34°)
OKLab	oklab(47.63% -0.0301 -0.1545)
OKLCH	oklch(47.63% 0.157 259)
XYZ	xyz(12.0754, 10.4656, 44.0227)
Luminance	0.1047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B58B3 #B3761B

analogous

#1BA4B3 #1B58B3 #2A1BB3

triadic

#1B58B3 #B31B58 #58B31B

tetradic

#1B58B3 #B31BA4 #B3761B #1BB32A

square

#1B58B3 #B31BA4 #B3761B #1BB32A

split-complementary

#1B58B3 #B32A1B #A4B31B

monochromatic

#0B2449 #133E7E #1B58B3 #2C74DF #6197E7

Accessibility & contrast

On white

6.79

#1B58B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#1B58B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B58B3

6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B58B3	#FFFFFF	#000000	##FFFFFF
##1B58B3	1.00	6.79	3.09	6.79
#FFFFFF	6.79	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D62B6

Deuteranopia (green-blind)

#0055B1

Tritanopia (blue-blind)

#006E7D

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1b58b3;
/* rgb */ color: rgb(27, 88, 179);
/* oklch */ color: oklch(47.6% 0.157 259.0);

Tailwind

colors: {
  custom: {
    50: '#7386ca',
    500: '#1b58b3',
    950: '#000000',
  },
}

SCSS

$custom: #1b58b3;
$custom-light: #7386ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1b58b3",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 179
  },
  "hsl": {
    "h": 215.921,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.47627,
    "c": 0.15746,
    "h": 259
  },
  "luminance": 0.10467
}

Semantic roles & 50–950 ramp

primary

#1B58B3

secondary

#CCA05E

accent

#A637F0

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1B58B3

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

Preview Lab → · Contrast checker → · Palette generator →