#1B58B0#1B58B0

#1B58B0 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.4% C 0.153 H 258.5°. Best body text is #FFFFFF at 6.84:1 contrast (WCAG AA passes).

Color values

HEX	#1B58B0
RGB	rgb(27, 88, 176)
HSL	hsl(215, 73%, 40%)
HSV	hsv(215, 85%, 69%)
CMYK	cmyk(84.7%, 50%, 0%, 31%)
CIE-LAB	lab(38.46, 14.53, -52.21)
CIE-LCH	lch(38.46, 54.19, 285.56°)
OKLab	oklab(47.4% -0.0306 -0.1503)
OKLCH	oklch(47.4% 0.153 258.5)
XYZ	xyz(11.7753, 10.3456, 42.4422)
Luminance	0.1035 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B58B0 #B0731B

analogous

#1BA3B0 #1B58B0 #281BB0

triadic

#1B58B0 #B01B58 #58B01B

tetradic

#1B58B0 #B01BA3 #B0731B #1BB028

square

#1B58B0 #B01BA3 #B0731B #1BB028

split-complementary

#1B58B0 #B0281B #A3B01B

monochromatic

#0B2346 #133D7B #1B58B0 #2A74DE #5F96E6

Accessibility & contrast

On white

6.84

#1B58B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#1B58B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B58B0

6.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B58B0	#FFFFFF	#000000	##FFFFFF
##1B58B0	1.00	6.84	3.07	6.84
#FFFFFF	6.84	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2162B3

Deuteranopia (green-blind)

#0054AE

Tritanopia (blue-blind)

#006D7B

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1b58b0;
/* rgb */ color: rgb(27, 88, 176);
/* oklch */ color: oklch(47.4% 0.153 258.5);

Tailwind

colors: {
  custom: {
    50: '#7386c8',
    500: '#1b58b0',
    950: '#000000',
  },
}

SCSS

$custom: #1b58b0;
$custom-light: #7386c8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b58b0",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 176
  },
  "hsl": {
    "h": 215.436,
    "s": 73.399,
    "l": 39.804
  },
  "oklch": {
    "l": 0.474,
    "c": 0.15342,
    "h": 258.5
  },
  "luminance": 0.10347
}

Semantic roles & 50–950 ramp

primary

#1B58B0

secondary

#CB9D5C

accent

#A538F0

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090B13

muted

#7B7C82

Preview Lab

Preview with #1B58B0

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

Preview Lab → · Contrast checker → · Palette generator →