#1C40B4#1C40B4

#1C40B4 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.8% C 0.188 H 265.4°. Best body text is #FFFFFF at 8.60:1 contrast (WCAG AA passes).

Color values

HEX	#1C40B4
RGB	rgb(28, 64, 180)
HSL	hsl(226, 73%, 41%)
HSV	hsv(226, 84%, 71%)
CMYK	cmyk(84.4%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(32.28, 32.19, -64.64)
CIE-LCH	lch(32.28, 72.21, 296.48°)
OKLab	oklab(42.85% -0.0152 -0.1872)
OKLCH	oklch(42.85% 0.188 265.4)
XYZ	xyz(10.5476, 7.2077, 44.0065)
Luminance	0.0721 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C40B4 #B4901C

analogous

#1C8CB4 #1C40B4 #441CB4

triadic

#1C40B4 #B41C40 #40B41C

tetradic

#1C40B4 #B41C8C #B4901C #1CB444

square

#1C40B4 #B41C8C #B4901C #1CB444

split-complementary

#1C40B4 #B4441C #8CB41C

monochromatic

#0C1A4A #142D7F #1C40B4 #2F58DF #6483E7

Accessibility & contrast

On white

8.60

#1C40B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#1C40B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C40B4

8.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C40B4	#FFFFFF	#000000	##FFFFFF
##1C40B4	1.00	8.60	2.44	8.60
#FFFFFF	8.60	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1c40b4;
/* rgb */ color: rgb(28, 64, 180);
/* oklch */ color: oklch(42.8% 0.188 265.4);

Tailwind

colors: {
  custom: {
    50: '#7574cb',
    500: '#1c40b4',
    950: '#000000',
  },
}

SCSS

$custom: #1c40b4;
$custom-light: #7574cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1c40b4",
  "rgb": {
    "r": 28,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 225.789,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.42848,
    "c": 0.18786,
    "h": 265.4
  },
  "luminance": 0.07209
}

Semantic roles & 50–950 ramp

primary

#1C40B4

secondary

#CCB260

accent

#C438F0

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1C40B4

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

Preview Lab → · Contrast checker → · Palette generator →