#1A57B3#1A57B3

#1A57B3 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.4% C 0.159 H 259.1°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#1A57B3
RGB	rgb(26, 87, 179)
HSL	hsl(216, 75%, 40%)
HSV	hsv(216, 85%, 70%)
CMYK	cmyk(85.5%, 51.4%, 0%, 29.8%)
CIE-LAB	lab(38.36, 16.31, -54.14)
CIE-LCH	lch(38.36, 56.54, 286.77°)
OKLab	oklab(47.38% -0.0299 -0.156)
OKLCH	oklch(47.38% 0.159 259.1)
XYZ	xyz(11.9679, 10.2892, 43.9943)
Luminance	0.1029 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A57B3 #B3761A

analogous

#1AA4B3 #1A57B3 #291AB3

triadic

#1A57B3 #B31A57 #57B31A

tetradic

#1A57B3 #B31AA4 #B3761A #1AB329

square

#1A57B3 #B31AA4 #B3761A #1AB329

split-complementary

#1A57B3 #B3291A #A4B31A

monochromatic

#0A2348 #123D7E #1A57B3 #2A73E0 #6096E8

Accessibility & contrast

On white

6.87

#1A57B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#1A57B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1A57B3

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A57B3	#FFFFFF	#000000	##FFFFFF
##1A57B3	1.00	6.87	3.06	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1962B6

Deuteranopia (green-blind)

#0054B1

Tritanopia (blue-blind)

#006E7C

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #1a57b3;
/* rgb */ color: rgb(26, 87, 179);
/* oklch */ color: oklch(47.4% 0.159 259.1);

Tailwind

colors: {
  custom: {
    50: '#7385ca',
    500: '#1a57b3',
    950: '#000000',
  },
}

SCSS

$custom: #1a57b3;
$custom-light: #7385ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1a57b3",
  "rgb": {
    "r": 26,
    "g": 87,
    "b": 179
  },
  "hsl": {
    "h": 216.078,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.47384,
    "c": 0.1589,
    "h": 259.1
  },
  "luminance": 0.10291
}

Semantic roles & 50–950 ramp

primary

#1A57B3

secondary

#CCA05D

accent

#A737F1

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1A57B3

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

Preview Lab → · Contrast checker → · Palette generator →